Beaglebone black usb-audio broken

Embedded Linux Discussions
1

Hello everybody.
I built am33x-v5.15 and am33x-rt-v5.15 kernels according to the topic below.
(Debian: Getting Started with the BeagleBone Black)
But usb-audio seems to be broken.
When I connect a usb-dac to Beaglebone black and play a wav file using aplay, the sound distorted significantly and slows.
Is there a kernel bug?

I also built am33x-v5.10 and am33x-rt-v5.10 kernels and they can play sound fine.

Are there other people having the same problem?
Also, if anyone knows how to fix it, please let me know how.

2

A similar type of problem was addressed here. You can see the answers: USB Audio problem with BeagleBone Black + SDK 07.00.00.00. - Processors forum - Processors - TI E2E support forums

3

Hi @matsumoto_yasuomi which usb chipset/device are you using? This smells like a regression, so it would be nice to get one and verify…

Regards,

4

Robert, thank you for your reply.
The DAC devices (USB chips) I have tested are:

ifi nano idsd (XMOS)
denon da300-usb (XMOS)

What do you know?

5

bidrohini
thank you for your reply.
I’ll try asking on the TI forums as well.

6

DMA on usb is disabled on am335x images. It’s never worked and has been broken forever…

Regards,