On Fri, 12 Jun 2009, Steve Langstaff wrote:

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From: alsa-devel-bounces@alsa-project.org [mailto:alsa-devel- bounces@alsa-project.org] On Behalf Of Jaroslav Kysela

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On Fri, 12 Jun 2009, Steve Langstaff wrote:

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Hi All.

I've got an installation of ALSA (1.0.19 on an embedded device) where

using

...

plug and dmix as my output device slows down playback - voices and

tones are

...

lower in pitch and the playback takes longer than when not using

plug:dmix,

...

e.g.

Does 48000Hz 2 channel source work OK with direct device (without dmix) for your hardware?

Yes, I converted the original sample to 48000 Hz, Stereo, and it sounds OK when I don't use dmix.

/mnt # time aplay -v ignition48000s.wav

....

Slave: Hardware PCM card 0 'LM4549' device 0 subdevice 0

msbits : 16

If I remember correctly, this value was 32 in your dmix setup. Could you try command:

aplay -D"plug:'dmix:FORMAT=S16_LE'" <filename>

Jaroslav

----- Jaroslav Kysela perex@perex.cz Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc.