frame is what is played out(during playback) or what is recorded(during capture) at each sample. so this frame depends on what format your sound is i.e whether it is one channel or two channel and length of each sample, whether 16 bit or 8 bit.
so a 2 channel stereo 16-bit sound will have a frame of 4 bytes. i.e two bytes per channel and two channel period size is number of frames? (or bytes?) between two successive interrupts. -- Pannaga Bhushan yan hang fai wrote: > Dear everyone > I have a question on using this api call. > In the last argument, we need to pass in the "frame". But the problem > is that I dont understand the term "frame". Could anyone explain to me a > little bit what it is? And also, what is meant by a "period"? > I have read http://www.suse.de/~mana/alsa090_howto.html and tested > their "Basic PCM audio" program, I heard some random noise coming out from > my speakers as the program is executed. Then I tried to modify the > program. First I read some pcm data into a char* from a local file, then I > tried to call snd_pcm_writei, passing my pcm data as argument. But I hear > no sound. So I would like to know what I should pass as the "frame" > argument. > Thank you very much ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
