From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Alsa asynchonus playnback
Date: Tue, 29 Nov 2011 16:14:23 +0100
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To: Martin schmidt <schmidtmartin00@googlemail.com>
Cc: alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Martin schmidt wrote:
> my problem is, the sound has an Echo (in german Hall-Effekt).
>
> int write_to_audiostream(short*buf)
> {
>     memcpy(audiobuffer[audiobuffercounter],buf,audio_buffersize*sizeof(short));
>    int w=  snd_pcm_writei (pcm_handle, audiobuffer[audiobuffercounter], 2* audio_buffersize);

This looks correct (as long as the buffer is correctly filled).
Do you ever check w?

>    audiobuffercounter = ++audiobuffercounter % 10;

It is a bad idea to disable compiler warnings, or to not heed them.

> in a Timer-Event

Why a timer?  How is the timer synchronized to the sample clock?


Regards,
Clemens