Beaglebone black usb-audio broken

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.

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

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…


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?

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

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