Takashi Iwai <tiwai <at> suse.de> writes: > > At Wed, 17 Jun 2009 16:10:26 +0800,> Zero Luo wrote:> > > > Dear Takashi,> > > > Data from usb dongle is 16K*16 bit PCM data.> > And what is the format and channels you are using in alsa-lib?> alsa-lib itself can convert formats and channels automatically if needed.> > Takashi In alsa-lib ,I set data format as 8K * mulaw . hwparams.format = SND_PCM_FORMAT_MU_LAW; hwparams.rate = 8000; hwparams.channels = 1; Yes,indeed alsa-lib help to convert formats.But before alsa-lib convert pcm data to mulaw,I dumped the src data in snd_pcm_mulaw_encode() which already has no "0000" . Zero _______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
