High audio loopback latency on Orange Pi 5

[Kashyap Gada]

I run a audio loop code on a Raspberry pi 4/5 and Orange Pi 5.

The latency of audio loop is 0.2 seconds on Raspberry pi but on orange pi it takes 1.2 seconds.

For orange pi, i am facing this problem with different Operating systems as well apart from armbian. I've used Ubuntu, Orange Pi OS, Armbian. All have got this problem. The code I have attached. Since the issue is faced in multiple Operating System I strongly feel this has to do with the driver level softwares or directly related optimization from Rockchip.

 

Can anyone guide what I could do

audio-loop.cpp

[royk]

Which kernel? The 5.10 kernel has known issues with USB audio, the 6.1 vendor kernel should work correctly.

Further a realtime kernel might help and set pulseaudio at rt priority.