| Summary: | Without tsched=0 for module-udev-detect, sound is distorted | ||
|---|---|---|---|
| Product: | PulseAudio | Reporter: | Josef Hahn <ale> |
| Component: | core | Assignee: | pulseaudio-bugs |
| Status: | RESOLVED MOVED | QA Contact: | pulseaudio-bugs |
| Severity: | normal | ||
| Priority: | medium | CC: | david.lynam, diego.viola, freedesktop, lennart, n.schnelle |
| Version: | unspecified | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
pacmd list
pulseaudio --log-level=4 |
||
|
Description
Josef Hahn
2012-05-30 11:48:36 UTC
Created attachment 62297 [details]
pacmd list
Created attachment 62298 [details]
pulseaudio --log-level=4
I'm having this same issue, without "tsched=0" in "load-module module-udev-detect", Skype gives me very choppy/horrible audio quality. When I have "load-module module-udev-detect tsched=0" in /etc/pulse/default.pa, audio is crystal clear. I have experienced this issue only in Skype. VLC and mplayer are giving me great audio quality (all of them are using pulseaudio driver). My system is archlinux x86_64, pulseaudio 4.0. Thanks. Ok so I went to #pulseaudio and asked about this issue there. heftig has replied to me and gave me some helpful suggestions: 14:46:01 heftig | diegoviola: try starting skype with PULSE_LATENCY_MSEC=30 14:46:35 heftig | (and reenable tsched) So I did that, removed tsched from load-module module-udev-detect in /etc/pulse/default.pa, restarted pulseaudio, and started skype with PULSE_LATENCY_MSEC=30. Now sound is good again, and I don't notice any other problems with audio anymore. Anyway, this seems to be a Skype problem, doesn't it? I don't get any problems with audio with other applications, VLC, mplayer, amarok, etc. Anyway, thanks to heftig and all the people who have helped. It's only skype problem I have same problem with various random applications. But have strange thing... If I open pavucontrol window the sound play perfectly. When closed pavucontrol window sound distorted again. WHAT?! I try with tsched=0 and this prevents the issue. just btw: I never have used or even installed skype. here it was with all kinds of programs. vlc player was affected all the time. it is/was definitely _not_ a skype-only issue. On new haswell i3 laptop and kubuntu 14.04.3, viber is literally unusable (sound distortions doesn't go away). Option tsched=0 fixes distortions. I have had distorted sound in skype and viber on different laptop/desktops for years, so I think there are bugs in pulseaudio's glitch free audio implementation. Node 0x02 [Audio Output] wcaps 0x41d: Stereo Amp-Out
Control: name="Speaker Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Device: name="ALC892 Analog", type="Audio", device=0
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x40 0x40]
alc892 has 64 steps with 1 dB per step
it is strange that pulseaudio hardware volume at -1.2dB
ulseaudio] alsa-sink.c: Got hardware volume: 0: 96% 1: 96%
D: [pulseaudio] alsa-sink.c: in dB: 0: -1.20 dB 1: -1.20 dB
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/294. |
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