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volumio / platform-asus

Volumio platform files for Asus Boards
GNU Lesser General Public License v3.0
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Kernel update request -DSD pop noise fix #25

Open epicfrequency opened 5 years ago

epicfrequency commented 5 years ago

Per backport in Tinkerboard's debian kernel repo. Request to update the fix into Volumio tinker board image as well

https://github.com/TinkerBoard/debian_kernel/commit/44e2ce5d21774feaf90ba428db695a62ee9adb41

Eliminate noise at the start of DSD playback. ALSA: usb-audio: Eliminate noise at the start of DSD playback. Copy mainline DSD playback pop noise fix

torvalds@0120073#diff-cc9fc192670bbec31122ad6874641755

[Problem] In some USB DACs, a terrible pop noise comes to be heard at the start of DSD playback (in the following situations).

[Cause] At the start of playback, there is a little silence. The silence bit pattern "0x69" is required on DSD mode, but it is not like that.

[Solution] This patch adds DSD silence pattern to the endpoint settings.

Signed-off-by: Nobutaka Okabe nob77413@gmail.com Signed-off-by: Takashi Iwai tiwai@suse.de

volumio commented 5 years ago

Thanks, we'll look at it. @gkkpch what do you think?

gkkpch commented 5 years ago

Yes, I saw that last Friday. It's already done in our volumio version of the tinkerboard kernel. (This is temporary solutuion, we will eventually change this back to the official Asus after Michelangelo and I have tested & verified the Rockchip fix for the sampling frequency issue. As this will take a while, we will update our own kernel so a new Image can be built (approx. 2 weeks from now)