Re: [Alsa-user] Short pauses in playback depending on output volume

2017-01-22 Thread Fabian Keller
Thanks for your ideas! I didn't know nmon, interesting tool. But unfortunately it shows nothing unusual when a glitch happens, everything seems to be in a steady state: ~5% CPU load and no "Huge Pages". Also, there are no dmesg messages during playback at all. Since low volume output has no glitche

Re: [Alsa-user] Short pauses in playback depending on output volume

2017-01-19 Thread James Shatto
Does the playback file exist on a slow storage device? I have a few usb sticks that pause with cd quality wav files because of the slow I/O of the device. But the same file compressed to flac or mp3 on the same storage device will play without pauses. Or the cd quality file on any "faster" devic

[Alsa-user] Short pauses in playback depending on output volume

2017-01-15 Thread Fabian Keller
Hi all, While developing an audio software based on PortAudio, I discovered a surprising problem related to ALSA: I'm getting short pauses in the audio playback (sounding like typical buffer underruns) depending on the audio amplitude. As a test, I have generated two wave files containing pure wh