[pulseaudio-discuss] distortion and clipping with 0.9.15-test3

Lennart Poettering lennart at poettering.net
Thu Mar 19 06:58:49 PDT 2009

On Thu, 05.03.09 22:32, Brian J. Murrell (brian at interlinx.bc.ca) wrote:

> I'm using 0.9.15-test3 with various applications including rhythmbox and 
> I am noticing the audio will be distorted and clipping at times, although 
> the overall output volume is quite reasonable (I'm 40, not 15).
> Looking in the volume control I have RB set (in the Playback tab) at 49% 
> volume and the actual sound card (in Output Devices) at 49% also.  These 
> seem like reasonable values that should not cause the louder sequences in 
> various tracks to distort or clip.  They certainly didn't with the 0.9.10 
> that I am upgrading from.

Please make sure that the underlying alsa mixer is correctly
configured for you. Play around with "alsamixer -c0" and make sure
that no track is beyond 0dB.

> Oh crap.  Having the volume control open just triggered:
> E: core.h: Assertion 'pa_object_refcnt(pa_object_cast(o)) > 0' failed at ./pulsecore/core.h:159, function pa_core_assert_ref(). Aborting.

Please provide a full back trace. Otherwise it is difficult to help you.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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