Michał Kowalczyk wrote: > SND_PCM_FORMAT_U8, //changing this type for any other gives an error in > the output: segmentation fault.
U8 has one byte per sample; if you try to use a bigger sample format, you have to enlarge the buffer accordingly. > 1, //argument responsible for channels; if I change it to 2(stereo) > program gives an segmentation fault error. Using two channels would double the buffer size, too. > 48000, //sampling rate; works good but if I modify this to lower value > the time of generating noise will be longer, don't know why. If the sample rate is lower, you need more timer to play the same number of samples. > frames = snd_pcm_writei(handle, buffer, sizeof(buffer)); The last parameter is measued in frames, not in bytes. When you use another sample format than U8/S8 or more then one channel, you have to divide the buffer size by the number of bytes per frame. HTH Clemens ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
