Why is the sample rate set to 48000? On Fri, Aug 27, 2021 at 6:40 AM mindfsck <mindf...@gmail.com> wrote:
> Thanks Sean. I unloaded the suspend module but the plop is still there. > I don't really think it is HW related since the file plays just fine with > paplay and aplay. > > On Fri, Aug 27, 2021 at 5:49 AM Sean Greenslade <s...@seangreenslade.com> > wrote: > >> On Thu, Aug 26, 2021 at 09:43:23PM +0200, mindfsck wrote: >> > Hi there, >> > >> > I was using this example to simply play a WAV file without having much >> clue >> > of audio: >> > >> https://www.freedesktop.org/software/pulseaudio/doxygen/pacat-simple_8c-example.html >> > I changed the sources to match (IMHO) my settings, i.e. channels=1 and >> > rate=48000. >> > >> > I have two wavefiles, the first plays as it should (compared with >> command >> > line paplay or aplay) and the second one has an audible PLOP (but only >> > around 90% of the time) at the very beginning of playback: >> > >> > (1 - OK) >> > General >> > Complete name : out_clean.wav >> > Format : Wave >> > File size : 81.3 KiB >> > Duration : 866 ms >> > Overall bit rate mode : Constant >> > Overall bit rate : 769 kb/s >> > Audio >> > Format : PCM >> > Format settings : Little / Signed >> > Codec ID : 1 >> > Duration : 866 ms >> > Bit rate mode : Constant >> > Bit rate : 768 kb/s >> > Channel(s) : 1 channel >> > Sampling rate : 48.0 kHz >> > Bit depth : 16 bits >> > Stream size : 81.2 KiB (100%) >> > >> > (2 - NOK) >> > General >> > Complete name : out_short_clean.wav >> > Format : Wave >> > File size : 22.8 KiB >> > Duration : 242 ms >> > Overall bit rate mode : Constant >> > Overall bit rate : 772 kb/s >> > Audio >> > Format : PCM >> > Format settings : Little / Signed >> > Codec ID : 1 >> > Duration : 242 ms >> > Bit rate mode : Constant >> > Bit rate : 768 kb/s >> > Channel(s) : 1 channel >> > Sampling rate : 48.0 kHz >> > Bit depth : 16 bits >> > Stream size : 22.8 KiB (100%) >> > >> > I tried using different BUFSIZE and my systemload is also not an >> issue... >> > Any ideas? >> >> I've experienced something like this with a few built-in audio cards on >> various laptops. It's never bothered me enough to track it down, but I >> suspect it's due to the suspending and resuming of cards. Can you try >> disabling the autosuspend module and see if it still happens? Use this >> command to temporarily disable it until the next time pulse reloads: >> >> $ pactl unload-module module-suspend-on-idle >> >> --Sean >> >>