On Sat, 6 Feb 2010 19:33:08 +0200 Grazvydas Ignotas <notasas@xxxxxxxxx> wrote: > It's on powerdown, there is a faint pop. It appears its the amp (final > part in the path), I tried to toggle it while playing /dev/zero > manually and it always pops on powerdown. On powerup there is a small > sound cutoff too, probably because of amp capacitors charging, but we > decided to leave it instead of halting every sound playing program > until the amp gets ready. > My side comment for the /dev/zero test. You may hear pops also if /dev/zero is played as unsigned 8-bit samples on signed DAC since then samples gets converted to maximum negative value. So there is a difference how the /dev/zero is played. First command below produces a pop because it's playing a pop and second produces a pop only if HW is producing it. aplay /dev/zero aplay -f S16_LE /dev/zero -- Jarkko _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
