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