for alsa-time-test.c
dev = argc > 1 ? argv[1] : "front:0";
cap = argc > 2 ? atoi(argv[2]) : 0;
fillrate = argc > 3 ? atoi(argv[3]) : 1;
there are three parameter which allow you to change
device
capture or playback
fillrate
most sound cards cannot use default fill rate 1
for hda-intel, the hw_ptr increase by 16/32 frames for each dma
transfer, fill rate can be lower than the period size
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https://bugs.launchpad.net/bugs/1315212
Title:
[CA0106 - CA0106, playback] Playback problem - Surround dies, no valid
output
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