vortecjr Posted February 9, 2013 Share Posted February 9, 2013 Ted, did I miss the explanation on why you need the USB hub as opposed to just using the MB USB outputs? Miska, the reason for some of the questions above might me that people don't understand how to apply the features on your software. The term convolution engine is enough to scare most including me. This is not the thread for it, but how about dedicated thread on the implementing some of the features? Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 9, 2013 Share Posted February 9, 2013 I think I figured out a way that you could do this with different DACs in the system. So you could use the Meitner DAC for two channels and two Myteks for the remaining channels or some other combination. I have to download a test file, update some apps and dig out some parts from the boneyard...I'll keep you posted. Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 9, 2013 Share Posted February 9, 2013 I can see a couple of no frills Sonore ExD's as perfect for this sort of "solution" What do you mean no frills? I'm kidding...I know it only had one input:) So from your main DAC...you could have XLR going to your main stereo rig and RCA to the two front channels of your surround receiver. And two ExD's for sides, front and sub No. I have something cooking with our DAC, but this is just for fun:) I fired up an old PC with a Lynx AES16 card. I downloaded a 5 channel .dff track from Channel Classics and dropped it into J-River Media Center 18. I setup JR-MC for multichannel and DoP output. When I add the title for playback I get an error for an unsupported format. Seems multichannel DoP uses 384 and the card only supports 192. If it used 176.4 per L/R channel we would be good and one could use digital into the DACs that support it.... Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 9, 2013 Share Posted February 9, 2013 Jesus, Linux has features for doing this stuff, but there are couple of tricky parts:- You need to have sample clocks synchronized, so one DAC needs to be master and other slave to it's clock, otherwise DACs will eventually drift out of sync. This can be done with word clock output and input. - More challenging is starting all the DACs sample-accurately at the same time to avoid phase error between channels. This needs a "broadcast launch-control", which I guess can be done with proprietary protocols like the RigiSys' implementation in Mytek. Usually on Windows ASIO driver takes care of this, on Linux ALSA can take care of the same (all the needed stuff is already there). In the old days, over ten years ago, I used to have an M-Audio Delta1010 interface (still in production), and it's ASIO driver has supported bonding four of those interfaces together to form a 32-channel in/out system. My Lynx card has 16 channels on board and the ASIO software and it's control panel take care of all that. In fact you can add more cards in parallel and sync them internally with a mater clock I/O header. Also, there is an OSS Linux driver (i have used it a bunch of times) for the card so it would also work there. To use ALSA with multiple USB devices one would need to write a fancy config file in asound? Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 11, 2013 Share Posted February 11, 2013 What do you mean no frills? I'm kidding...I know it only had one input:) No. I have something cooking with our DAC, but this is just for fun:) I fired up an old PC with a Lynx AES16 card. I downloaded a 5 channel .dff track from Channel Classics and dropped it into J-River Media Center 18. I setup JR-MC for multichannel and DoP output. When I add the title for playback I get an error for an unsupported format. Seems multichannel DoP uses 384 and the card only supports 192. If it used 176.4 per L/R channel we would be good and one could use digital into the DACs that support it.... Jesus R I have the setup playing via the Lynx card now. I can see 5 channels playing in the Lynx mixer and I have a 176.4 sample rate lock. I can't test the DoP output signal today, I'll try and confirm this tomorrow... Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 11, 2013 Share Posted February 11, 2013 You do need to write a specific asound.conf to use the ALSA 'multi' plugin. It's not that difficult. I've been using two stereo USB DACs utilizing the 'multi' plugin full-time for about 4 months now, and couldn't be happier. I initially set it up as my own 'proof of concept' test to confirm I could live with it. It's PCM only, currently, but with DoP now supported by mpd, I may upgrade in the future. Mark Mark, if you don't mind email me your asound.conf file so I can see what is involved... Jesus R [email protected] SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 13, 2013 Share Posted February 13, 2013 I have the setup playing via the Lynx card now. I can see 5 channels playing in the Lynx mixer and I have a 176.4 sample rate lock. I can't test the DoP output signal today, I'll try and confirm this tomorrow... Jesus R My test today confirmed that playback via J-River and the Lynx card is resulting in a multi channel DSD to PCM conversion at 176.4. BTW I think the USB solution is very cool and I was just trying to see if I could figure out a way to use your Meitner and two Mytek... Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
vortecjr Posted February 13, 2013 Share Posted February 13, 2013 I've been playing multichannel DSD with DoP on Linux and Windows (since I added DoP support), as well as DSD->PCM converted multichannel to various different 8-channel pro-interfaces. Any bit-perfect multichannel AES card should work fine with stack of Mytek's. Only new thing to me in this set up has been linking of multiple USB devices. Miska, I have HQ Player on this machine and will give it a try next.. Jesus R SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | endPoint | opticalModule DX | Power Supplies | Link to comment
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