[Gta04-owner] Low latency audio routing

Radek Polak psonek2 at seznam.cz
Tue Jan 17 22:27:21 CET 2012

i have now solved half of our problem with sound routing. This command works 
fine for me and routes sound from MIC to UMTS nearly in real time (10uS):

arecord -B 10 -fS16_LE | aplay -B 10 -Dhw:1,0

the important part seems to be the -B parameter which should be buffer time in 

However i need similar command for other direction. I am now getting underruns 
for any lower values and with high value the sound comes with delay. I am 
going to continue with experiments, but any hints in mean time are highly 



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