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HD Audio Support
mwillems:
First questions: what linux distro/kernel version are you running? DSD support is fairly "new" in the Linux kernel, so, for example, Debian stable's kernel doesn't have DSD support yet. Additionally, my understanding was that DSD512 may have been the maximum supported, but my research on this is about 6 months old so higher rates may have been implemented since then.
Additionally, my recollection is that MC's support for quad DSD (11.2 MHZ) is also fairly new, and may not have migrated into the Linux version. Maybe Bob can weigh in on the status of quad DSD support for Linux?
I don't have any DSD capable devices, so can't provide solid reproducible guidance unfortunately, other than: make sure your kernel is modern enough to support it.
Some (admittedly dated) info in this thread: http://www.head-fi.org/t/728236/ifi-idsd-micro-dsd512-pcm768-dac-and-headphone-amp-impressions-reviews-and-comments/1620
danhardison:
Hi,
I'm running debian jessie. 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux
The DSD support seems to be there, because I can play the example attached at 2.8Mhz and it says "no changes are being made", if I understand that correctly.
I don't understand the Sample Rate settings in DSP Studio. I set them all to No Change, and they stay like that for everything up to the 2.8Mhz DSD tracks, but when I play the 11.2Mhz track, it changes by itself to the attached (setting everything above 192,000 to 176,400.)
I am just curious about all this. I am trying things out in high def to see how good this DAC is. It's not mission critical! But I'd like to hear peoples experiences and/or opinions on the matter.
Dan
mwillems:
--- Quote from: danhardison on November 30, 2015, 07:42:34 pm ---Hi,
I'm running debian jessie. 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux
The DSD support seems to be there, because I can play the example attached at 2.8Mhz and it says "no changes are being made", if I understand that correctly.
I don't understand the Sample Rate settings in DSP Studio. I set them all to No Change, and they stay like that for everything up to the 2.8Mhz DSD tracks, but when I play the 11.2Mhz track, it changes by itself to the attached (setting everything above 192,000 to 176,400.)
I am just curious about all this. I am trying things out in high def to see how good this DAC is. It's not mission critical! But I'd like to hear peoples experiences and/or opinions on the matter.
Dan
--- End quote ---
High rate DSD and DOP were added in kernel 3.19, so after Jessie. If I had to guess I'd say that's your issue.
danhardison:
Oh OK!
So do you think if I upgrade the kernel, MC will work?
Thanks
mwillems:
I can't be sure because I don't own any DSD hardware, but have a look at the thread I linked above.
It looks like proper DSD support was added in 3.18 and 3.19. You'd need a kernel above 3.18 and a certain ALSA version as well.
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