Messages in this thread | | | From | Matt <> | Date | Wed, 2 Oct 2019 17:01:29 +0200 | Subject | possible audio regression for usb-audio with 5.3 kernel (5.3.1), sounds like variants of 8-bit audio |
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Hi Takashi,
there appears to be a sound regression for plug-n-play usb-audio DACs with 5.3 kernel.
I'm using the following one:
https://www.aliexpress.com/item/33012416525.html?spm=a2g0s.9042311.0.0.4f314c4dv3EF0p
which includes SA9023A + ES9018K2M on the chip.
When listening to parts of the Unreal Tournament 3 soundtrack the output resembles a bit like:
https://www.youtube.com/watch?v=9gq4R6acnBQ Rush - Tom Sawyer (8-bit NES audio render)
it immediately made me think of 8-bit audio and the NES.
First thought of misconfiguration in the kernel config but then went back to 5.2.17-rt9 (copying the config and only enabling full preemption) and there the output is correct and crystal clear.
For each kernel build I need to jump through a few hoops (nvidia driver, zfsonlinux modules, luks, genkernel, etc.) so it'll take a while to build and get it up and running.
System is: cat /etc/lsb-release DISTRIB_ID="Gentoo"
~amd64
gcc version 9.2.0 (Gentoo Hardened 9.2.0-r1 p2) GNU ld (Gentoo 2.32 p2) 2.32.0
PCIe related sound doesn't seem to be affected (Xonar DX), it works fine both on 5.3.1 and 5.2.17-rt9
Kind Regards
Matthew
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