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    The Computer Audiophile

    Computer Audiophile Pocket Server - C.A.P.S.

    m10_shot2-s.jpgOver the last several months I've researched different combinations of motherboards, computer cases, audio cards, and accessories that go along with these components. The goal of all this research was to put together a hardware and software music server solution that I would actually use and the Computer Audiophile readers could actually use. I would do the leg work, test & listen to everything, and provide the information for CA readers to put together the exact same music server. This sounds somewhat simple until one considers all the requirements that go into such an audiophile solution. Great sound, great looking, no moving parts, silent, fairly inexpensive, and 100% of the components must be available today. Along the way this server was named the Pocket Server by a colleague who was very surprise at its small size when I pulled it out of my carry-on luggage. The server is a bit larger today than it was at that time but the name hasn't changed. What follows is the story of the Computer Audiophile Pocket Server and all the information required to recreate the $1,500 C.A.P.S solution.

     

     

     

    Jack of All Trades Master of None

     

    Like many audiophiles I am never satisfied with the status quo. The status quo in computer based audio is to purchase a Windows based PC or a Macintosh, plug it in, and let 'er rip. That type of a solution works wonderful for the vast majority of the world's population and it's one I recommend frequently when the situation arises. Moving beyond the status quo many audiophiles including myself customize standard Macs and PCs until they're satisfied with the sound quality. This customization still does not address many of the issues inherent in a machine built for general computing and is often like polishing a turd. The CA Pocket Server Project began with a completely blank whiteboard. This way I had no turds to polish or in audiophile terms I had no jitter to clean up from the start. It's always better to build a fanless system rather than install inches of acoustical foam, fight with noise, and worry about other issues related to fans. That's the general thought process I used to approach this project. Plus, the always pertinent acronym K.I.S.S. Keep It Simple Stupid.

     

     

     

    Requirements

     

    The Computer Audiophile Pocket Server requirements were non-negotiable. I had to satisfy these requirements or the project would be a failure. I also elected to use many components that I haven't already discussed. I didn't want to rehash The Zalman or hFX based music servers I wrote about in 2008 and 2009. Those servers are still great, but don't meet all the C.A.P.S. requirements.

     

    • Absolutely silent.
    • Capable of great sound.
    • Great looking.
    • No moving parts.
    • Fairly inexpensive.
    • No legacy components.
    • Easy to operate.
      • Directly or
      • Remotely
    • Easy to assemble / install
    • Assembly / installation by one's self or
    • Assembly / installation by local computer shop, son, daughter, neighbor, or friend.
    • Small size.
    • Low power consumption.
    • Low heat.
    • Accept an add-in card for audio or additional capabilities. Hardware & Software must accept appropriate add-in cards.
    • Play 16/44.1, 24/44.1, 24/88.2, 24/96, 24/176.4, and 24/192 all bit perfect.

     

     

     

     

    Operating System

     

    The first step in the process was to test different operating systems. I rules out previous versions of Windows, including the apparent audiophile standard XP, because they were not current. Copies of Windows XP (OEM) are still floating around some of the online shops, but I was ready to retire XP anyway. That left Windows 7 as the Microsoft based candidate. Building a Mac OS X based machine (Hackintosh) is of no interest to me as it violates the Terms Of Service of OS X and is more of a tweaker's system than most audiophiles are willing to accept. Beyond the mainstream consumer operating systems I used used a variant of Berkeley Unix called FreeBSD in addition to a few distributions of Linux. I ruled out FreeBSD fairly quickly. After using it for a few hours as a music server I concluded FreeBSD was better left to host web servers and other business type applications. I am very fond of FreeBSD and I really wanted to like it as a music server OS but squeezing a square peg in a round hole wasn't a goal of the CA Pocket Server Project. I spent much more time researching and using Linux based operating systems than all the others combined. As I said at RMAF 2009, and I still believe today, Linux is the future for music servers. The only caveat is Linux requires quite a bit of knowledge to setup as a music server. The amount of knowledge required is a show-stopper for 99% of the Earth's population let alone analog loving audiophiles. However, if I could satisfy the C.A.P.S. requirements I was willing to attempt writing an extremely thorough how-to Linux guide for CA readers to build this music server. The Linux based operating systems I used are Debian Linux, Voyage Linux, Puppy Linux, Arch Linux, openSUSE, Ubuntu Studio, and probably a couple more that I can't remember at this time. The final selection of an operating system for the C.A.P.S. server came down to Windows 7 and Voyage Linux.

     

     

    Voyage Linux is an incredibly small operating system. It can fit on a tiny USB memory stick, compact flash drive, or any hard drive currently available. The initial installation requires about 128 Megabytes of disk space, not to be confused with 128 Gigabytes. Voyage installs as a barebones operating system. The user must add or update audio features such as Music Player Daemon (MPD), Advanced Linux Sound Architecture (ALSA), and other tools like NCMPC and Minion. There are countless options when using Linux. This is a great thing for most Linux users but can be overwhelming to those trying it for the first time. I forced myself to use Voyage Linux for many weeks. Without the option to jump over to a Mac or Windows based server one can become very well versed in Linux music servers. On the contrary one can quit using a Linux music server due to frustration if one doesn't have the necessary time and skills to work through problems. The Voyage based system I setup satisfied all but three of the stated C.A.P.S. requirements. Requirements 7,12, and 13 were constant battles. I tried a few different audio cards and had varying levels of success with each of them. I used an ESi MAYA44 and RME 9632 for much of the time. I was unable to pass 24/176.4 digital audio out of the ESi MAYA44. The MAYA44 data sheets proclaim support up to 24/192, but the user manual states clearly on page 34, "Sample rate supports : 32, 44.1, 48, 88.2, 96, (192)kHz *Coaxial Output only." Without 24/176.4 the MAYA44 card failed the requirement. The RME 9632 audio card was a different story. About 100 hours into the configuration nightmare I was able to pass bit perfect audio on all required sample rates. Configuring the RME 9632 in Linux was extremely frustrating. There are bits and pieces of outdated user generated documentation all over the Internet. If there is demand I will create my definitive guide to the RME 9632 on Linux. There are software, firmware, and hardware incompatibilities to work through. I'm really happy I put in the time to make it work on the C.A.P.S. server as I learned quite a bit in the process. Once I had the card working on all the required sample rates I still had problems changing sample rates on the fly when I switched audio tracks. I could not get this to work no matter what I tried. I did create scripts to change sample rates but each one had to be called up via command line before playing a track that required a sample rate change. This mix of problems is what lead me to exclude Linux from the list of possible operating systems. Requirements 12 and 13 combined equate to a system that is not easy to use. Audio cards with Linux support that also support the required sample rates are few and far between. The cards that do exist are not user friendly enough for most people to use on a daily basis. Canned servers, that one can purchase off the shelf, based on Linux and cards such as the RME 9632, RME HDSP AES-32, Lynx AES16 (with OSS drivers), or even the ESi Juli@ card have a bright future. Creating this type of solution at home for one's self is not for the average audiophile seeking to listen to music rather than fiddle with a computer. That said, I continue to use Linux in my listening room next to my other servers.

     

     

     

    Note: The ESi Juli@ card supports all the required sample rates but can be very hard to obtain. I was unable to procure one during the several months of this project. Even with a Juli@ card a Linux based solution still does not meet the C.A.P.S. requirements.

     

     

    <b>Windows 7</b> satisfies all of the software based requirements. It is capable of great sound, it's a current OS, easy to operate and install, works with more hardware than any other OS, and is capable of bit perfect playback at all required sample rates when configured properly. I selected the more efficient 32-bit version of Windows 7 Ultimate as the operating system of choice for the C.A.P.S. server. More than anything the 64-bit version ruled itself out because of the minimum hardware requirements for a 64-bit OS. I could not use the hardware I wanted and still use the 64-bit version of Windows 7. Even if the hardware supported 64-bit Windows 7 I still think I would use the 32-bit version. There are no benefits to using a 64-bit operating system on the C.A.P.S. server. I selected J River Media Center 14 as the playback and library management application for the C.A.P.S. server. MC 14 has become my new go-to Windows based music application because of its features, flexibility, and bit perfect playback.

     

     

     

     

    Hardware

     

    The motherboard is the most critical component of the C.A.P.S. server. Without the right motherboard most of the requirements can't met. Readers not schooled in computer hardware should know a motherboard is the main board to which everything in a computer connects. The motherboard dictates what CPU can be used, how much memory can be used, how many and what type of hard drives can be used, and everything else that goes together to build a working computer. The first criterion I used to determine the best motherboard for the C.A.P.S. server was number four, no moving parts. There are many methods to eliminate moving parts from a motherboard such as the addition of passive cooling used in servers based on the Zalman TNN300 or hFX chassis. Adding passive or active cooling only increases complexity. I wanted a motherboard with no moving parts out of the box. Such a motherboard had to include passive cooling as part of the board's design. This requirement reduced the number of qualifying motherboards down to a handful. I had previously built a Linux based music sever using a motherboard from the swiss company PC Engines. These boards are very small, have incredibly low power requirements, but have too many limitations for the C.A.P.S. server. PCI slots, memory slots, hard drive capabilities, and operating system limitations were too much to overcome. One capability I really like using with a current PC Engines board I have is Power over Ethernet (PoE). This board receives all its power via an Ethernet cable. It's a nice bonus in the aesthetics department when one can remove the power cable from a component. After much research and testing I selected the mini-itx Intel D945GSEJT motherboard for the C.A.P.S. server (Photo 1)(Photo 2). This board has a built-in, non-removable, Intel Atom N270 1.6 GHz CPU that is passively cooled with low profile attached heat sinks. No CPU fan required. The Intel D945GSEJT has two SATA hard drive ports. Connecting standard SATA solid state hard drives (SSD) eliminates another source of moving parts from the server. Spinning hard drives are a source for noise, greater power requirements, increased heat, and can limit the computer case options. One feature that elevates the Intel D945GSEJT motherboard above others is the built-in full size PCI slot. This satisfies the requirement for add-in audio cards or additional capabilities. By additional capabilities I am talking about a PCI FireWire card to connect a FireWire DAC or FireWire hard drive for people using USB DACs.

     

    <img src="https://audiophilestyle.com/s3/images/graphics/2010/0208/psu.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left">Power requirement for the Intel D945GSEJT is very flexible. One can use a traditional computer power supply that connects to the board's 2x2 power port. These traditional power supplies are rarely fanless, rarely silent, and can decrease the number of computer case options due to mounting requirements. The Intel D945GSEJT also accepts an external 12 volt power supply similar to most laptops on the market. A silent fanless external power brick was easily my choice to power the C.A.P.S. server.

     

     

    Other notable features of the Intel D945GSEJT include on-board S/PDIF digital audio output headers. Header is another term for pins on the motherboard to which one can connect devices. This output supports 16/44.1, 24/48, and 24/96 sample rates. A special cable is required <a href="" class="thickbox" rel="C.A.P.S-Cable">(Photo 1)</a> <a href="" class="thickbox" rel="C.A.P.S-Cable">(https://audiophilestyle.com/s3/images/graphics/2010/0208/IMG_0080.JPG)</a> to use this S/PDIF output as there are no built-in S/PDIF ports. A full-mini PCI Express slot is available for wireless cards or other devices like a hardware decoder to increase video playback capabilities. One of the USB headers on the D945GSEJT can be used for an eUSB solid state drive. I purchased an eight GB eUSB drive for this server <a href="https://audiophilestyle.com/s3/images/graphics/2010/0208/atp-8gb.png" class="thickbox" rel="C.A.P.S-eUSB">(Photo 1)</a> <a href="https://audiophilestyle.com/s3/images/graphics/2010/0208/atp-8gb-measurements.gif" class="thickbox" rel="C.A.P.S-eUSB">(Photo 2)</a>, but did not use it with the Windows 7 installation. Windows 7 will not install to a USB drive even if it's placed directly on the motherboard. I have installed Linux to this tiny drive without any issues. An underrated feature of small mini-itx motherboards is the network speed capabilities. Many small boards only contain 10/100 Mbps network cards. The Intel D945GSEJT has an on-board 10/100/1000 Mbps card commonly referred to as a gigabit Ethernet card.

     

     

    <img src="https://audiophilestyle.com/s3/images/graphics/2010/0208/sodimm2gb.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left">The maximum amount of random access memory <b>(RAM)</b> the Intel D945GSEJT will accept is two GB in its only memory slot. The decision to use two GB of RAM doesn't require any thought or further discussion here. Just add to cart, it's cheap. Selecting a hard drive to meet the no moving parts requirement is easy if one has unlimited funds. Fortunately Solid State Drives <b>(SSD)</b> continue to decrease in price every week. At the time of this writing an OCZ Vertex Turbo 60GB SSD is $219. This is not the exact drive I used in the C.A.P.S. server but it's contains the same amount of disk space as the one I used. If I were putting together the C.A.P.S. server today I would purchase the OCZ drive previously mentioned. There is currently no way store most people's music collections on local solid state hard drives. The available sizes just aren't large enough without spending thousands of dollars on convoluted PCI/e SSD devices. That's why I selected a 60GB SSD. Most music must be stored elsewhere. My music is located on a Network Attached Storage (NAS) device. If an external spinning USB or FireWire drive is necessary then so be it. At least C.A.P.S. server is free from internal moving parts for now. In the future it will be possible to house all one's music locally on solid state storage.

     

    <b>Audio card</b> selection for the C.A.P.S. server was fairly easy for me, a Lynx AES16. I am a strong supporter of the Lynx AES16 PCI card for its sound quality and its advanced capabilities. The Lynx enables one to use an external clocking device and supports dual wire AES. I used both of these features during the <i>d</i>CS component review. Along with the Lynx AES16 card I also recommend a custom cable from a place like Redco. Redco will make a cable with only one or two AES wires and a clock wire if desired for about $60. That said, there are many more audio cards available. I hesitate to say it but I did use the Merging Technologies Mykerinos card and Pyramix software on the C.A.P.S. server for a few weeks. Wonderful sound, but it doesn't meet many of the requirements of this project. An audio card I would really like to use in the C.A.P.S. server is the ASUS Xonar Essence St. I currently have the STX PCIe version that will not work in the C.A.P.S. server as it doesn't have a PCIe slot. A few weeks ago ASUS provided me a prerelease ASIO driver for the STX card. I was very pleased to see the card now outputting bit perfect audio at 16/44.1, 24/96, and 24/192. According to ASUS 24/88.2 and 24/176.4 support will be part of the final ASIO driver version. The reason I mention all of this about a card that won't work in the C.A.P.S. server is because this driver also works for the ST PCI version of the Xonar Essence card. Since I haven't heard the ST version I can't comment on the sound quality. However if the quality is similar to the STX version with the new ASIO driver I will highly recommend the ASUS Xonar Essence ST card and consider it a great option for the C.A.P.S. server. The ST PCI version of the card is available for around $200 at many online stores.

     

     

    During this project I researched a countless number of <b>computer cases</b>. I'm glad I did the research, but I could have saved all that time by selecting the case I originally wanted from day one of the project. The Origen<sup>ae</sup> M10 computer case was clearly the best case for the C.A.P.S. server. Audiophiles not only like great sound, we like excellent build quality and products that look just as good as our audio components. The all aluminum (5mm) Origen<sup>ae</sup> M10 case meets or exceeds all the requirements set out for the C.A.P.S. server. The case ships with a 60mm fan, but it's only required if the internal components need additional air flow. I never took the fan out of the box. The M10 is built for a mini-itx motherboard such as the Intel D945GSEJT. Installation is very simple. Origen<sup>ae</sup> provides the four required screws to attach the board to the bottom of the case. The 2.5" 60GB SSD selected for the C.A.P.S. server screws easily onto the inside panel right next to the SATA power and data cable ports on the motherboard <a href="https://audiophilestyle.com/s3/images/graphics/2010/0208/IMG_0077.JPG" class="thickbox" rel="C.A.P.S-SSD">(Photo)</a>. Also included is a mountable tray to hold a slim slot-loading CD/DVD drive. I didn't install such a drive as I wanted to keep things very simple and I had no need for an internal CD/DVD drive. I used a USB CD/DVD drive to install Windows and I use a different computer to rip my CDs to the easily accessible NAS device. If I did install a DVD drive I would select the Pioneer DVR-TS08 slim slot-loading SATA drive for under $60. The M10 case features a very nice looking front display and hidden infrared sensor. I was unable to utilize these features because the Intel D945GSEJT motherboard has a power incompatibility with the M10. The M10 ships with its own 150 watt external power supply but I was unable to make it work with the Intel D945GSEJT motherboard. The D945GSEJT would not accept power via the 2x2 connector and the internal case electronics required a 20/24 pin motherboard connection, that the D945GSEJT doesn't have, to function properly. This incompatibility may have a silver lining. Audiophiles are always seeking ways to turn off unneeded features or capabilities and frequently use single purpose components such as a DAC with separate power supply or separate external clock. Turning off a component's display is nothing new to audiophiles either. This time there is no option to turn the display on or use the included remote control. I don't know if the lack of these features reduces any electrical noise inside the case but I'm willing to bet an argument could be made in support of such a reduction. Again, this is strictly because I selected a motherboard that was not 100% compatible with the M10 case. I've read other reports of these features working very well. In fact with a compatible motherboard it would be possible to control applications like J River Media Center via the infrared remote control. The Origen<sup>ae</sup> M10 case supports half-hight PCI cards sitting vertically in the motherboard's PCI slot. I placed an ASUS Xonar HDAV 1.3 Slim card into the PCI slot and it lined up perfectly with the hole to screw the card into place stabilizing it with the unique internal metal frame of the case. The M10 can also accommodate full size PCI cards like the Lynx AES16 and ASUS Xonar Essence ST by use of a PCI riser card <a href="https://audiophilestyle.com/s3/images/graphics/2010/0208/IMG_0076.JPG" class="thickbox" rel="C.A.P.S-Riser">(Photo)</a>. A PCI riser card simply enables the PCI card to mount horizontally instead of its native vertical placement. I know of no detrimental effects by using such a riser card. I was initially concerned about heat dissipation as most of the motherboard rests underneath the horizontally mounted Lynx AES16 card. Thus far I've yet to experience any heat related issues. I've even listened to four hours straight of 24/176.4 HRx material outputting dual wire AES to a DAC without a single hiccup and the M10 case is cool to the touch. Inside the case the Lynx AES16 card is no hotter than any other installation I've seen. The bottom of the Origen<sup>ae</sup> M10 case features four metal with rubber bottom feet. The feet are tall enough to allow placement of the case on short carpeting and the rubber bottom of the feet enable one to place the case on any surface without scratching. I currently place the M10 case on carpet in my listening room instead of behind a wall where my other music servers reside. The case looks very nice and I have no reason to hide such a component. This placement also allows me to use short AES cables from my Lynx AES16 card to my DAC. Overall I don't consider the power incompatibility an issue. I would purchase this case without the extra features were it available in such a configuration. Plus, I personally user remote desktop for control of the server and wouldn't use the IR receiver or front panel anyway.

     

    <img src="https://audiophilestyle.com/s3/images/graphics/2010/0208/imo_touch.png" style="padding: 5pt 10pt 7pt 5pt;" align="left">Use of a <b>monitor</b> is not something I normally consider with my music servers. The Intel D945GSEJT does have analog DSUB and digital DVI video outputs. One of these is certainly required for system setup and could continue to be used if necessary. Seeking to add something extra to the C.A.P.S. server I contacted the nice people at Mimo. A few days later an iMo 7" Pivot Touch USB monitor arrived at my door. On paper or computer screen this touchscreen monitor seems too good to be true for only $199. Unfortunately it is too good to be true. I used the iMo 7" Pivot Touch on Windows and Mac system before concluding it wasn't my cup of tea. Connected to the C.A.P.S. server I had nothing but trouble using this little touchscreen. Initial setup wasn't very smooth, but I was eventually able to see my desktop on the iMo. Next I went through all the calibration steps to fine tune the touchscreen. Calibration is pretty simple, but when it came to actual use the iMo was a nonstarter. If I had infant size fingers I would like the monitor about 10% more than I currently like it. I don't have huge fingers but they are too large to click on a single track easily. Forget about navigating a menu. I had to touch the screen about one inch away from my intended target. This was troubling when I had to touch the lower right corner. My finger needed to be an inch off the screen over the non-touchscreen frame of the monitor. The only good thing I can say about the iMo Pivot Touch 7" touchscreen is that it may work as neat display similar to how Jeff Kalt of Resolution Audio used the non-touchscreen version at CES this year. I do not recommend people purchase this monitor before using it themselves. Needless to say the iMo 7" Pivot Touch did not make the cut to be part of the C.A.P.S. server.

     

     

     

    <b>Comparison</b>

     

    Compared to a Zalman TNN300 based silent music server the C.A.P.S. server comes out very well. The two main benefits of the Zalman baed server are disk space and the ability to use PCI Express cards in addition to PCI cards. The Zalman is also capable of handling more memory. Both servers are absolutely silent with no moving parts. The Origen<sup>ae</sup> M10 based C.A.P.S. server is far more visually appealing than a Zalman TNN300. The Zalman case is no longer manufactured although there are plenty left in the supply chain here in the U.S. The C.A.P.S. server case is $320 and the Zalman TNN300 is $690. Not a single component in the Zalman servers is less expensive than coresponding C.A.P.S. serve component. The C.A.P.S. server (9.5" x 4" x 9.8" w feet, 6.6 lbs.) consumes far less space than a TNN300 (13" x 9" x 18.5" 32.5 lbs.). The CA Pocket Server is an excellent way to use a Lynx card in one's system without planting a huge PC tower next to audio components. I think both the C.A.P.S. and Zalman based servers are capable of similar great sound quality.

     

     

     

    <b>Wrap-Up</b>

     

     

    The Computer Audiophile Pocket Server project was frustrating at times but well worth the time, money, and effort. Make no mistake the C.A.P.S. server will never be a commercial product that benefits Computer Audiophile financially. This server was created to be a great solution for myself and CA readers alike. There are an unlimited number of ways to change this configuration or adjust it to one's personal needs. No single configuration is the right configuration for everyone. Despite some technical terms weaved into the article this is a really easy music server to build as a whole or in part. I know many people who like to dig into projects like this and I also know many people who want nothing to do with a computer project. Fortunately the C.A.P.S. server was created with both groups of people in mind. Using off the shelf parts currently available to anyone CA readers can undertake this project themselves or simply call up a local computer shop and have them put it together. Whether one builds it, buys it, or brushes it off is irrelevant. The Computer Audiophile Pocket Server's purpose is to increase one's enjoyment of our wonderful hobby.

     

     

     

     

     

     

     

     

     

     

     

    <i>The Computer Audiophile Pocket Server piece by piece</i>

     

    <b>Motherboard</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/d945gsejt">Intel D945GSEJT Johnstown Mini-ITX Motherboard</a> - $109.00</li>

    </ul>

     

    <b>Power Supply</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/pw_12v6a7">Power Adapter DC 12 V, 80 W</a> - $29.00</li>

    </ul>

     

    <b>RAM</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/256msq64v6u">TRANSCEND 256MSQ64V6U SO-DIMM DDR2 667 Memory 2GB</a> - $73.00</li>

    </ul>

     

    <b>Solid State Drive</b>

    <ul>

    <li><a href="http://www.newegg.com/Product/Product.aspx?Item=N82E16820227469&cm_re=ocz_ssd_turbo-_-20-227-469-_-Product">OCZ Vertex Turbo OCZSSD2-1VTXT60G 2.5" 60GB SSD</a> - $219.00</li>

    </ul>

     

    <b>PCI Riser</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/bp_pci_jt">PCI Riser Card for D945GSEJT</a> - $10.95</li>

    </ul>

     

    <b>Digital Audio Card</b>

    <ul>

    <li><a href="http://sonore.us/Lynx-AudioCards.html">Lynx AES16 PCI Audio Card</a> - $625</li>

    </ul>

     

    <b>Custom AES Cable</b>

    <ul>

    <li><a href="http://www.Redco.com">Lynx AES16 Cable</a> - ~$60</li>

    </ul>

     

    <b>Computer Case</b>

    <ul>

    <li><a href="http://www.shop.perfecthometheater.com/product.sc?productId=201&categoryId=30">Origen<sup>ae</sup> M10</a> - $320</li>

    </ul>

     

    <b>Music Application</b>

    <ul>

    <li><a href="http://www.jrmediacenter.com/purchase.html">J River Media Center 14</a> - $50</li>

    </ul>

     

     

     

    Other bits and pieces used during the C.A.P.S. Project that did not make the final build.

     

    <b>Hardware Decoder</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/bcm970012">Broadcom BCM970012 - PCIe Mini Card</a> - $59.00</li>

    </ul>

     

    <b>Solid State Drive</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/fdm44xdi4g">Emphase 44-pin Industrial Flash Disk Module 4 GB - 4000X</a> - $69.00

    (Windows installation too large for 4GB version)</li>

    </ul>

     

    <b>Solid State Drive</b>

    <ul>

    <li><a href="http://www.memory4less.com/m4l_itemdetail.asp?itemid=1442265462">OCZ 16GB PATA PCIe Mini Solid State Drive</a> - $151.69

    (Will not fit on Intel D945GSEJT motherboard)</li>

    </ul>

     

    <b>Solid State Drive</b>

    <ul>

    <li><a href="http://www.memorysuppliers.com/eusb-ssd-8gb-af8gssgh.html?CAWELAID=325272124">ATP eUSB SSD 8GB Z-U130</a> - $139

    (Windows can't be installed to this drive)</li>

    </ul>

     

    <b>Wireless Card</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/int_5100">Intel Wifi Link 5100 802.11a/b/g/Draft-N PCIe Mini Card</a> - $29.00</li>

    </ul>

     

    <b>Wireless Antenna</b>

    <ul>

    <li><a href="http://www.logicsupply.com/products/kdbv0a_pc250">Wireless Dual Band Antenna, 108 mm (4") and Pigtail Cable</a> - $17.00</li>

    </ul>

     

     

     

     

     

    <b> Click To Enlarge Photos</b>

     

    C.A.P.S. Server in my listening room.

     

    <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0071.JPG" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0071-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0072.JPG" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0072-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0074.JPG" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0074-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0075.JPG" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0075-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" alt="C.A.P.S 01"></a>

     

     

     

    <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0073.JPG" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0073-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" alt="C.A.P.S 01"></a>  

     

     

     

    Stock Photos of Origen<sup>ae</sup> M10

     

    <a href="http://images.computeraudiophile.com/graphics/2010/0208/M10_main.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/M10_main-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/m10_strip.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/m10_strip-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" alt="C.A.P.S 01"></a>

     

     

     

     

    <a href="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot1.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot1-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot2.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot2-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot3.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot3-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot4.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot4-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" align="left" alt="C.A.P.S 01"></a>   <a href="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot5.jpg" class="thickbox" rel="C.A.P.S"><img src="http://images.computeraudiophile.com/graphics/2010/0208/m10_shot5-s.jpg" style="padding: 5pt 10pt 7pt 5pt;" alt="C.A.P.S 01"></a>

     

     

     

     

     

     

     

     




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    At first a big thank you to The Computer Audiophile for writing this article, it's an excellent clue for everyone aiming to start a similar project (like me)!<br />

    <br />

    Now my question: I wonder if the Atom N270 on the D945GSEJT mainboard is able to run bit-perfect realtime (I'm going to use Linux) audio AND an of course simple GUI without problems? Since the OS for the C.A.P.S. is Windows 7 I assume there is a GUI..<br />

    <br />

    Did anyone using an Atom N270 or a D945GSEJT ever have performance problems? How are you using your N270 based PCs (Server without GUI, Win7 with aero, etc)? I'm a little bit suspicious towards these little Atom CPUs since I always used "big" CPUs. ;)

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    I am not sure I understand the question (Linux basis) <br />

    <br />

    but for me<br />

    <br />

    I have had Zero, nada, nichts problems, using it 1-2 hours/nite 3-4 days/week<br />

    <br />

    No <br />

    hesitation or lags<br />

    dropouts<br />

    hiccoughs<br />

    shutdowns<br />

    freakouts<br />

    etc<br />

    <br />

    I am using Windows 7-32(can't use 64)<br />

    -MediaMonkey<br />

    -VNC server (controlled by remote laptop)<br />

    -multiple NAS drives that have proprietary software on the CAPS device<br />

    -computer left on 24/7, looged into when I listen <br />

    <br />

    The only thing that does not work, which I suspect is configuration but was not worth trying to figure out is WINDOWS REMOTEDESKTOP will let me scroll through my music library (on the CAPS server) but the music "grays out" in MediaMonkey and will not play which is supposed to mean it is not available<br />

    <br />

    AND<br />

    <br />

    MAC REMOTEDESKTOP has bizarre colors, funny screen stuff. I don't remember if it worked otherwise but is a non issue as the VNC works so well and is free.

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    I'm sorry if my English is not that good. ;) I just added the information that I will use Linux because I mentioned realtime and afaik there is no realtime support in Windows. So my question has actually nothing to do with Linux.<br />

    <br />

    Anyway, you got it all right, appearance/absence of CPU performance caused troubles are exactly what I wanted to know about, because I can't quite believe that this tiny netbook-CPU is powerful enough for a professional audio desktop-PC.<br />

    Only thing I still didn't understand: do you (and everyone using a N270 based CAPS) have I/O devices directly on your CAPS or do you only access it through remote desktop?

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    Your English is perfect<br />

    <br />

    I only use VNC (or Remotedesktop if it worked).<br />

    <br />

    My goal from day 1 was to try and replicate the listen to an album experience while looking/touching the vinyl/CD cover so I could<br />

    <br />

    Look at art work<br />

    Look at lyrics if available<br />

    Look at personnel on album if available<br />

    See entire album list of songs<br />

    etc.<br />

    <br />

    Walking over to the PC would not allow me to easily do that and would be a gigantic hassle if I wanted to "move around" the library. <br />

    <br />

    I have found the ability to jump around my music library to be the most spectacular thing about PC audio. It is very interesting to see other artist's interpretation of the same song or other songs by same artist..<br />

    <br />

    Since my "music only" room is really what others call a living room, I did not want the monitor present and visible all the time. Hence the remote laptop/Ipad (maybe)seems to be the best solution to me as I just close up the laptop when done.<br />

    <br />

    <br />

    Just my 2c.

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    I have that MB and after using it quite a bit with a Linux based OS I think it's great. I run Vortexbox Linux (free distribution from vortexbox.org) with mpd and I can watch the cpu in real time while it's playing 24/192 wav files and it does not even tickle the cpu. Having said that be warned MPD can upsample and that MB does not seem to want to handle it. Who cares though it would not be bit perfect that way:)<br />

    <br />

    I also have had low power embedded single core VIA MBs (now retired) with Windows 7 that ran fine for music playback with various players. I would not run the mouse around during playback and I would wait for the software to finishing monitoring the drives then listen to music.<br />

    <br />

    Jesus R<br />

    www.sonore.us

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    Thank you for sharing your experiences. Since both of you don't have any problems, I guess it will be a D945GSEJT then.

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    Sorry for bothering you again but I just noticed, that you don't seem to use any effects processed in realtime (equalizer, etc), which is probably to preserve bit perfect playback. Unfortunately I expect that I will have to use an equalizer since my K701 headphones produce very little bass.<br />

    <br />

    Afaik effect-processing is completely done by the CPU, so this would be a huge increase of CPU load and I'm wondering if the Atom N270 is powerful enough to calculate that. Any experiences? Or could someone maybe try it?<br />

    <br />

    Thanks in advance!<br />

    <br />

    EDIT: Additional question to the linux user(s): Does anyone of you happen to use JACK on this CPU, or know if it works without dropouts, etc?

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    It seems that you love J River. But what about MusicBee? http://getmusicbee.com/ I really like it (fast, free, great UI and rich of features, especially in library management) but worry about sound quality. Do you have any opinion?

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    Hi... Great project and a remarkable how-to.<br />

    Since I intend to start slowly (and keep money for an external DAC, probably the Moon 300D), I intend to try the Xonar Essence PCI and I was looking for cheaper cases hosting the Intel motherboard you recommend.<br />

    Doing a quick search on E-Bay, I saw a lot of listings pairing the Intel Bobo and a Morex T1610 case like this one: <br />

    http://www.morex.com.tw/products/productdetail.php?fd_id=123<br />

    <br />

    I find it very interesting, especially since it can sit in a LCD screen mount.<br />

    <br />

    Does anybody has experience or recommendations regarding this case?<br />

    <br />

    <br />

    <br />

    <br />

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    Yes, there are lots of cheeper cases around, however you'll need one which supports a PCI slot (and preferably full height PCI) if you want to add a card such as the Xonar. <br />

    <br />

    Eloise

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    <cite>..."Other notable features of the Intel D945GSEJT include on-board S/PDIF digital audio output headers. Header is another term for pins on the motherboard to which one can connect devices. This output supports 16/44.1, 24/48, and 24/96 sample rates. A special cable is required <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0078.JPG">(Photo 1)</a> <a href="http://images.computeraudiophile.com/graphics/2010/0208/IMG_0080.JPG">(Photo 2)</a> to use this S/PDIF output as there are no built-in S/PDIF ports."</cite> <br />

    <br />

    Chris,<br />

    Where did you get this S/PDIF connector?

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    Hi Jeff - I had it made by someone at a high end manufacturer. Since it's not a cable company I don't want to direct anyone to him.<br />

    <br />

    It's an extremely hard cable to find on the Internet that's for sure. Maybe if enough people want them a cable company will build a batch of them.

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    Your right. It was very hard to find. But, after an extensive search, I found one at frontx.com. <br />

    Here's the link in case anybody else ever needs one:<br />

    <a href="http://www.frontx.com/pro/p1062_030.html"> <br />

    RCA VIDEO / SPDIF - PANEL F TO 1X3 F</a>

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    Hi Chris,<br />

    <br />

    First let me thank you for all your effort in developing the CAPS and managing this blog. Very well done.<br />

    I am considering building the CAPS but before I wanted to know if 6 months later you see any components that could be upgraded from the start? Any similar mothercard with upgraded Intel CPU?<br />

    As a first try I also intend to use the ASUS Xonar card instead of the Lynx card. <br />

    <br />

    Thanks in advance.

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    Hi Tamino - Thanks for the kind words. I am planning to create a C.A.P.S. v2 server with updates. It will probably be a few weeks before I have everything tested and the article published.

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    Hi Chris,<br />

    Well noted. I am eager to read about C.A.P.S. v2.

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    I’ve found this extremely interesting.<br />

    A very good bit of info here Chris. Thank you very much.<br />

    I’m seriously considering trying out something similar having read this and recently listened to a friends server system based around different components feeding an AVI active setup.<br />

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    Chris,<br />

    <br />

    I am very interested too, was just about to order v1, good timing.<br />

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    Hi Chris,<br />

    A great article and great work on the CAPS music server.<br />

    When reading about previous music servers, I was very close to trying to put a system together. But, I was deterred by the possibility (even if slim) that some combination of hardware and software might blow out the tweeters on my $20K speakers. That possibility (however slim), made the project a non-starter. My question: HAS THAT PROBLEM BEEN RESOLVED WITH THE CAPS SYSTEM YOU HAVE DESCRIBED?<br />

    If so, my second question is: Do you know anyone who would be willing to put the precise system you describe together for me for circa $2000. ($1500 for the parts and circa $500 for the labor and testing.) I have enough experience with computers to know that, even with a supposedly simple system, I am likely to reach an insurmountable obstacle at some point. Finally, can the system be made with a SPDIF digital output cable that will connect to the SPDIF connector on my Berkeley Audio Alpha DAC, which looks like a BNC connector. (It is SPDIF but the connector looks to me like a BNC, rather than a standard RCA connector.) Would the SPDIF connection materially degrade the sound compared to the AES/EBU?<br />

    Thanks very much!<br />

    Dennis Graves

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    Hi Dennis - The original blown tweeter issue with WIndows servers and Lynx cards does not occur on the C.A.P.S. server. The original issue only happens with a combination of old software and firmware that will not work with Windows 7. <br />

    <br />

    I'm wiling to bet any local computer shop will put this server together for you. Just provide a list of components or show them this article and that's all they'll need. <br />

    <br />

    The system could be made to connect to the Alpha's BNC S/PDIF input. You could use an audio card like the Asus Xonar series that ouputs coaxial S/PDIF. Then just get a RCA to BNC converter to put on the end of the cable and you're good.<br />

    <br />

    You'll have to judge the sound quality differences if any.

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    Chris, one further question, please. I am confused about hour recommendation of the Asus Xonar card for an SPDIF digital out. From your article on the CAPS server, I understood that the Asus card would not fit in the motherboard and case of the CAPS server. Am I misinterpreting your article? <br />

    Assuming both the Asus and Lynx cards fit the CAPS motherboard and case, are you recommending the Asus Xonar card instead of the Lynx because the Lynx does not output a digital SPDIF signal, or because you like the Asus card better?<br />

    Thanks very much!<br />

    Dennis<br />

    <br />

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    Hi Dennis - Asus makes a few different Xonar cards. The HDAV Slim 1.3 PCI card fits perfectly in the C.A.P.S. server and offers coaxial S/PDIF output. The Lynx only outputs AES/EBU digital. Your requirements are for coaxial S/PDIF so I recommended the Xonar. If I were you I'd use the AES input on the Alpha DAC and use a Lynx card. That's just me. Or, you could wait for the Berkeley Audio Design USB to S/PDIF product coming this year.

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    Chris:<br />

    Into what file format should redbook CDs be ripped for best sound with the CAPS system? <br />

    I note you like JRiver for a ripping and organizing tool, but I have not been able to get JRiver to rip in anything other than .cda format (I change the encoding to .WMA, but the rip still shows up as .cda format.)<br />

    A rather large oversight in the JRiver software is that it has about a hundred categories of data for listing and organizing (including such obscurities as "spouse") but fails to include a category for composer!<br />

    As a serious classical listener, one of the problems I have found with much of the software available is that they don't seem to understand much about classical music. For instance, with one ripping package the metadata always comes up with the first name of the composer (eg, "Wolfgang Amadeus") so that you cannot sort and organize by the composer's last name (eg. "Mozart"). That makes its system virtually worthless.<br />

    Thanks for your assistance.<br />

    Do you know of any software that is particularly suited to classical collections?<br />

    Dennis

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