If you haven't already this might be better asked on the alsa-devel list. Probably the first thing they will tell you there is that you should be using the 0.9.0 version of alsa as 0.5.x is no longer under development.
-Eric Rz. Kuball, Martin wrote: > Hi! > > I tried to write some programs for sound processing recently. Most of it > went very well, but some questions about the aplay code (version 0.5.10), > which I used as example, remain unanswered. Maybe some of you can help me. > > The first is: In the capture_go method a buffer is filled using > snd_pcm_plugin_read and than written directly to a wave file. The > documentation says that in block mode the driver returns the data for each > channel in a separate part of the buffer. But wave files expect the samples > to be interleaved. As arecord does indeed work, some of my thoughts must be > wrong. But which one is it? > > And the second one: Why is the size of a fragment choosen to be a power of > 2? Why not a multiple of os_page_size * number_of_voices? Is it just the > programers preference or is there a good reason for it? > > Martin > > > _______________________________________________ > Alsa-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-user > > . > > _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
