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I found this from the thread:
I was configuring foobar2000 for DSD following the Yulong instructions (http://www.yulongaudio.com/en/shownews.asp?id=32). The foo_dsd_asio driver was not appearing. Then reading the foo_input_sacd component installation readme.txt file I realized that the ASIO Proxy needs to be installed. Yulong instructs to set the foo_dsd_asio PCM do DSD Method to none. This will allow foobar2000 to play PCM as PCM and DSD will be bitstreamed to the DAC as DoP. Then I became curious about this PCM do DSD feature. If you choose any method from the list the driver will upsample the PCM source to DSD. It really works. I installed the latest version (0.6.5), just released. The proxy not only works with foobar2000. It is installed into the Windows and become available to players that use ASIO. I tried it with JRiver MC 18. You just need to select the foo_dsd_asio in the output mode settings. Clicking on "Open Driver Control Panel" will open the driver's control panel window. There you can choose to upsample PCM to DSD. The bitstreaming must be set for Custom/DSD. Do not set DSD over PCM (DoP).
I still need more time to decide whether the upsampled output sounds better or not. My first impression is that I liked the original not upsampled better. To my ears the upsampled output sounds smoother but the dynamics is smoothed too. The music sounded slower and less engaging.
I only tried the SDM Type A and SDM Type D(FP32). I was using the speakers and still need to experiment the various options with headphones.
To download the latest foobar SACD decoder (includes the ASIO proxy): http://sourceforge.net/projects/sacddecoder/files/foo_input_sacd/
To download just the proxy: http://sourceforge.net/projects/sacddecoder/files/foo_dsd_asio/
I'm not sure whether I have ASIO proxy installed as above mentioned, need to read foo_inpu_sacd readme tonight.
Thanks for the helpful links dude, I noticed that the drivers on yulong's site included the asio proxy along with the foo_input_sacd plugin, but I wasn't sure what it was for or if I needed to install it, as Yulong's site wasn't all that clear. Your guide just saved me hours of potentially fumbling around to get Foobar to upsample to DSD. Will try it and let you know how it works!
No, I still can't make it work. If you can make it work, please write down the steps and share with us. I'll try tomorrow to set it up while connecting DA8 with my PC. I think the trick is whether I need to connect DA8 while install the driver. The Audio-Gd DAC I have requires me to connect before installing anything.
Think I'm on my way to figuring something out, got it to upsample to 384khz by adding the sox resampler plugin... gonna look up the dsd frequencies and try those, hopefully thats all there is to it.
Edit: Disregard that, forget about the sox resampler, just set the foo_dsd_asio to SDM Type B, DOP Marker 0x05/0xFA . I think set DSD64 for 2.8mhz, DSD128 for 5.6. Confirmed working, front panel says USB DSD and filter mode changes to 50,60,70 khz. Used the 64 bit asio binary btw and 64 bit asio output in foobar, though I am running windows 7 x64 so the 32 bit binary didn't even show up in foobar.
Also yes, it seems you need to turn the DA8 on for the usb to recognize, so it should be turned on to ensure the drivers install correctly. Its similar to the audio-gd usb32 in that the usb power seems to come completely from the DA8 itself and not from the computer's 5v line.
Second Edit: Seems its possible to put it into DSD mode using the foo_dsd_asio plugin, then setting the SoX resampler to 384khz. Of course, since the DA8's screen says USB - DSD I have no confirmation its doing just that, but it appears to play, which is a positive step.
I am absent minded. The first install instruction is "install Yulong USB driver and ASIO driver". I overlook the second driver. I think I can go on to configure it now. Thanks!