[LAD] Opening ALSA devices (hardware and PCM)

Good evening everyone! I was wondering, is there a difference in opening a device like plughw:0,0 and plug:pcm.my_own_device I've looked in the code of aplay, but small as this tool is, it contains still a good deal of functionality, so it seems. I've compared it to the other code in question. there are differences. So now I think it's best to ask and to guess, which is which and what piece of code, which function signatures are acutally used for which purpose. The application is question is chan_alsa from asterisk. So it's quite limited: configured for 8kHz, 16bit (either se or le) and mono. They use a fixed periodsize and connected buffer. I found, that plughw:0,0 acutally let's me here things, if not really capture input myself, but I'll pounce on that, when it's time. I want to connect a pcm-device wired to JACK to the asterisk software, yet it either tells me, that the argument is invalid Plug:pcm.name or plug:name) or it gets read/write errors or it simply crashes. :-( I've seen that they use nonblocking mode and interleaved data. So any suggestions on that? Warmly yours Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de