Clemens, thanks for your help. Can you explain what function of alsa api I insert 128kbps value of pcm file? In my example, I'm reading the content of pcm file and writing directly on sound device, however I don't know the length of buffer that I send to sound device. Can be any length of buffer? Thanks, Flavio Clemens Ladisch <cladisch@xxxxxxxxxxxx> escreveu: Flávio Yuiti wrote: > I did a test with pcm file and the sound is playing very fast, > > snd_pcm_open(&handleSound,"hw:0,0",SND_PCM_STREAM_PLAYBACK,0) Use "default" as device name. Using "hw" will prevent any automatic sample format/rate conversions. > //snd_pcm_hw_params_set_rate(handleSound,hardwareParam,8000,0); This shouldn't be commented out, and you should check the return values of all these functions. HTH Clemens __________________________________________________ Fale com seus amigos de graça com o novo Yahoo! Messenger http://br.messenger.yahoo.com/ _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel