Comments on: Direct DSD support on Volumio up to DSD512

By: Martin

Martin — Mon, 23 Oct 2017 00:11:42 +0000

Hi, after some test, I found that Volumio doesn’t recognize WavPack compressed DSD streams

From http://www.wavpack.com/WavPack5PortingGuide.pdf:

“An application has three options for dealing with WavPack files containing DSD audio. The first is to do nothing, in which case WavPack will report an error when attempting to open such a file (the error is “not configured to handle DSD WavPack files!”). This is what unmodified applications will see.
The second option is to include the flag OPEN_AS_PCM when opening the WavPack file. In this case, the DSD file will be appear as 24-bit PCM, and will automatically be decimated 8X during decoding. This allows applications that cannot natively handle DSD audio to do so. Note that this will still result in a very high sampling rate (352.8 kHz for DSD64) with lots of remaining quantization noise and should therefore be further down-sampled before use. This is how the WavPack Cool Edit and Audition filters and the winamp plugin handle DSD audio (the winamp plugin downsamples another 4x for playback while the Audition filters assume that the user will do this as they see fit). In this mode WavpackGetBitsPerSample() returns 24 and WavpackGetBytesPerSample() returns 3 when a DSD file is opened.
The third option is to include the flag OPEN_DSD_NATIVE when opening the WavPack file. In this case, the DSD file will be appear as 8-bit PCM, but each 8-bit PCM sample returned will actually be 8 consecutive 1-bit DSD samples, with the MSB being first temporally (same as DSDIFF). The channels are interleaved at the sample level (just like PCM) and these 8-bit DSD bytes are returned in the lower 8 bits of 32-bit integers (just like 8-bit PCM is returned). In this mode WavpackGetBitsPerSample() returns 8 and WavpackGetBytesPerSample() returns 1 when a DSD file is opened.”

By: Michael Panucci

Michael Panucci — Thu, 19 Oct 2017 03:19:05 +0000

Michaelangello Than You. For your help it worked.
I don’t have anI2S dac so I skipped step #4 of the Installation Instructions.
Perhaps a note that says *use these settings for most standard DACS.
Love the sound thru the Digione and Volumio!
Thanks again.
Mike Panucci

By: voladmin

voladmin — Wed, 18 Oct 2017 09:32:54 +0000

In reply to Zek.

No again. And I suggest to go with the DAC we advertise on our shop, for 2 reasons:
1- They will work flawlessly, since we have only tested and proven equipment with good price\quality.
2- You will support manufacturers and the Volumio project, and its your chance to give back what you get with Volumio.

By: Zek

Zek — Tue, 17 Oct 2017 18:57:58 +0000

What about this DAC
http://www.ebay.com/itm/ES9038-Q2M-DAC-DSD-Decoder-Support-IIS-DSD-384KHz-Coaxial-Fiber-DOP-/272844357070?afsrc=1&rmvSB=true

By: voladmin

voladmin — Tue, 17 Oct 2017 00:47:23 +0000

In reply to Zek. No, as far as I know.

By: Zek

Zek — Tue, 17 Oct 2017 00:09:28 +0000

Does Volumio on RPi3 support this I2S DAC with ES9028Q2M?
http://www.ebay.de/itm/Assembly-ES9028Q2M-ES9028-I2S-DSD-Input-DAC-Decoders-Board-With-Soft-Control-CPU-/182568706320?hash=item2a81f16110:g:Gq0AAOSwdjNZEz0C&clk_rvr_id=1336853468447&rmvSB=true

By: Hans

Hans — Tue, 19 Sep 2017 12:18:04 +0000

Hi there !
Any update about SACD ISO feature?

Thanks a lot for your work!

By: Martin

Martin — Sat, 09 Sep 2017 13:16:22 +0000

Hi, WavPack compressed DSD streams are played by Direct DSD?

By: Sam

Sam — Tue, 22 Aug 2017 05:56:02 +0000

Hi, Is there a way to disable the automatic DSD to PCM conversion, so that if the USB DAC doesn’t recognise the DSD stream then nothing plays?
Unfortunately my USB DAC does not have an interface that shows the file type playing.

By: Joe

Joe — Thu, 17 Aug 2017 05:47:17 +0000

Hello,

I have a Bryston BDA-3 that supports native DSD. When I enable the direct DSD feature on Volumio, it still resamples to PCM. DoP works as expected. Any ideas?