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barrows

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About barrows

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  1. barrows

    Sonore opticalRendu

    or just a different cable? Cable providers will terminate with different connectors to suit, as long as you have a Gigabit SFP. Fantastic quality optical cable is cheaper than good quality CAT 6A...
  2. barrows

    Chords New M -Scaler

    Yes, I think this is correct. But, the ESS chips, IMO, do sound better when run synchronously (as long as the source/masterclock is low jitter) where the masterclcok and bit clock are derived form the same clock. For example, I run the ESS 9038 with a 45.1584 masterclock, and this same clock is the clock input to the Amanero interface, and re-clocks the data lines just before the DAC. Synchronous operation like this drops out (or one can turn it off) the DPLL as it has no need to make changes as the masterclock and bit clock are already synchronous.
  3. barrows

    Chords New M -Scaler

    I used to know for the 9018, cannot remember now. There was a huge thread )probably still there) at diyaudio.com about the ESS 9018, and designer Dustin Foremen talked a lot there about how the chip operates. My understanding is that the final rate is related to the master clock rate (which has a wide possible range).
  4. barrows

    Chords New M -Scaler

    That is pretty cool if people take advantage of it. I changed the analog filter in my DAC a bit (relaxed it for DSD 256 input). Jussi, are the recommended analog filters in the AKM data sheet?
  5. barrows

    Chords New M -Scaler

    We know more than that about ESS. My understanding for the 9018 is that it first makes an 8x pass, this is controllable and can be defeated (although this where the "jitter eliminator" works, as an asynchronous sample rate converter), then there is another step of up conversion, to very high MHz levels at 6-9 bits (bit rate is user selectable). I am almost certain, that with DSD input, there is an SDM step, but I am not sure about how the sample rate is handled. Remember that ESS volume control works with DSD, so there is processing going on. Although ESS does seem to remain tight lipped about exactly what happens. The ESS chip will not convert DSD if the first stage of processing (the "OSF") is turned off (true for 9018 and 9038). It is clear the ESS chip is not operating as simply as a discrete DSC-1 type DAC, or even as simply as the recent AKM chips in pure DSD mode. That said, I am very happy with the sonics of the ESS 9038 feeding it exclusively DSD 256, so I optimized my DAC build for DSD 256 and it sounds great. I also run it synchronously, supplying Bit Clock and Master Clock from the same oscillator such that the DPLL completely drops out.
  6. barrows

    Sonore systemOptique

    Prices have not been announced for the opticalModule. Yes, like any of the Rendu series of Ethernet Renderers (microRendu, ultraRendu, etc), the opticalRendu will perform best with the best power supply possible.
  7. barrows

    Sonore systemOptique

    A suitable FMC, SFP modules, and some optical cable will cost ~$100.00. Putting internal optical isolation inside a Rendu in the way you propose would add considerably more to the price than that, and makes little sense, as one still has the noise transmitted over the Ethernet cable coming into the Rendu where you do not want it (where it can couple to the other circuitry and the USB output). It is a much better solution to offer the optical input as a way to fully isolate the Rendu from any noise present in the commercial computer gear (and optical cable can be run 100s of meters, so one can easily get all the commercial computer gear and its noise well away physically from the audio system).
  8. barrows

    Sonore systemOptique

    Sorry for any confusion! For clarity: systemeOptique is not a product, it is a name which refers to series of products from Sonore using optical transmission. Currently the announced products from Sonore are: opticalRendu: this is an Ethernet Renderer, with optical input, and USB output for connection to a DAC. opticalModule: this is a high end FMC (fiber media converter) with Ethernet (copper) cabling in/out and optical Ethernet in/out. The opticalModule is used to convert from wired Ethernet (CAT 6A, etc) to optical (fiber) Ethernet. Neither of these products is available yet. The opticalRendu will be released first, and the opticalModule will come later.
  9. barrows

    Sonore opticalRendu

    Sure, I am glad you understand for some clarity: FMC: fiber media converter. this is a device with has a wired Ethernet input/output, and an optical Ethernet input/output (SFP cage). It is used to convert Ethernet from optical to wired, and as are all ethernet accessories it is bi-directional. SFP module: this is the module which inserts into the SFP cage on both the opticalRendu and the FMC (or an Ethernet switch with an SFP cage). The module provides the actual optical signal, and is chosen to match the cable in use (for example LC to LC) and the capabilities of the unit. Sonore optical Module: This is a forthcoming product from Sonore which is a high end FMC. In your setup, to incorporate an opticalRendu, the easiest way would be: Connect an FMC to your router or switch via Ethernet cable (like CAT 6A), put an SFP module in the FMC for LC (optical) cable type, run an LC/LC optical cable to the opticalRendu from the FMC. And then run the USB cable from the opticalRendu to your DAC. I hope that explanation makes sense.
  10. barrows

    Sonore opticalRendu

    deleted...
  11. barrows

    Sonore opticalRendu

    @sahmen: 1. Only you can make this determination, I cannot decide for you what level of improvement might be "worthwhile". 2. To incorporate an opticalRendu you would need the opticalRendu itself, an FMC (or Sonore optical module when available) two SFP modules (one for the FMC and one for the opticalRendu) and an optical cable of appropriate length. The power supply for the opticalRendu would be the critical one, of you are satisfied with the performance of the LPS-1.2 then that would be suitable. Of these components, the FMC will need a power supply (they are generally sold with a cheap SMPS), but the FMC is isolated from the opticalRendu, hence I would not bother with an upgraded power supply for it. Remember that SGC is a separate company from Sonore, and as such they may sell and recommend gear of their choosing. The best power supply for the opticalRendu is hard to determine at this point, I have not personally tested anything yet, so I am not going to make recommendations. As the opticalRendu is not available yet we have some time to sort this out. Also remember that UpTone Audio is a different company from Sonore as well, I have no experience with the LPS 1.2, and as such I would not comment on its performance.
  12. barrows

    Sonore opticalRendu

    At that point I would not bother with an opticalRendu then... Realistically, the regular wired Rendus already sound fantastic... Of course diminishing returns is always a factor at this level, but we are talking about sources which blow the doors off even the very best disc spinners here. I view the power supply, for any component, as the foundation of that component's performance. I would not put a Kia engine in a McLaren, nor would I use an average power supply for an opticalRandu. At this level of performance I am talking about system prices at $25K and up, I do not think a few extra dollars for a really good power supply is inadvisable. OTOH, if one has a $1500.00 Chinese DAC, perhaps spending money on an opticalRendu is not the top priority for the system... In top level components the power supply is often the most expensive part of the component, as the actual parts often cost the most (large amounts of quality capacitance, and good transformers are physical parts which by their nature cost quite a bit in terms of electronic parts), understanding that, one can see why a really good power supply costs some money; and this is half of why the Signature Series Rendus with no compromise built in power supplies are quite a bit more money than the external power supply versions (the other half is the expense of the customer made in USA chassis).
  13. barrows

    Sonore opticalRendu

    Seems like anyone would want to go with the best power supply possible? Why would one want to compromise, the better the Renderer, the bigger difference a really good power supply makes. This is the same with most things in audio: increase resolution, and small differences get bigger...
  14. barrows

    Chord Qutest

    There will be a difference. The oversampling step form 44.1 kHz PCM to 705.6 kHz PCM will be the most audible step, and that step will feature whatever filter chosen in HQplayer, so the HQPlayer filter will dominate the sound. For the most part, oversampling from 705.6 upwards in the Qutest will not (or at least should not) have any audible filtering artifacts because all possible artifacts from filters operating at such high levels will be very far outside the audible bandwidth. Bottom line: if you oversample in software before the Qutest to 705.6 PCM, what you hear will be the sound of the software based filtering and not the filters in the Qutest. So one can compare if they prefer HQPlayers filters, or the Qutest filters, send oversampled data at 705.6 from HQPlayer to hear how HQPlayer oversampling sounds, and send native data (44.1, etc) to hear how the Qutest's filters sound. I would recommend doing this test with 44.1 kHz files, as this will maximize the differences in filter sound.
  15. barrows

    Sonore opticalRendu

    1. The opticalRendu is an Ethernet Renderer with an optical Ethernet input instead of a wired Ethernet input. It also features further improvements over the ultra and micro Rendus. 2. The optical module is a high end quality Sonore made FMC (fiber media converter) for converting wire based Ethernet to optical Ethernet. 3. The etherRegen is a product made by UpTone Audio, not Sonore, and has no relationship with the Sonore products (but some people might choose to use them together). Discussions about the etherRegen belong in the UpTone Audio forum threads. The EtherRegen is a Network Switch, not a Renderer-it is unrelated to the opticalRendu. Please let us know if you have other questions regarding the opticalRendu.
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