On Tue, Jun 10, 2003 at 12:24:21PM -0400, Paul Davis wrote: > >I'm using a digital Hammerfall audio card and was wondering how to > > which hammerfall? digi9652 or hdsp9652? > > >figure out the sample rate of the ADAT input pcm stream (which can vary > >from 32kHZ to 96kHZ). I tried functions like > >snd_pcm_hw_params_get_rate() but they do not seem to give the right > >answer. Any hints? > > the ALSA hardware parameter model doesn't include the notion of an > "external rate". > > >BTW, when the input format changes, it would be great to be notified > >about this. Are there any notification handler which could be used for > >this purpose. > > there is no way to differentiate between an ADAT signal at 32/44.1/48 > kHz and a "bit/channel stream format" at 64/88.2/96 kHz. so we can't > tell you that. however, on the hdsp series, the "External Rate" > control (read only) can be used to check the rate. i don't know > off hand whether it can be used for notifications via blocking on > read/poll for the control. >
Up to now, I thought ADAT was only defined for 44.1 and 48 kHz, but maybe I'm wrong in this point. Ok, I believe that the hw doesn't use a restriction in that point. But are there really any devices that can handle all those rates. (I have asked rme a few month ago, and they told me that ADAT is only defined for 44.1/48 kHz. But I've only asked them for 32kHz and not for the double-speed modes, because I'm still living in a rme32 world;-) ) Hmm, does this info help in some way? martin ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The best thread debugger on the planet. Designed with thread debugging features you've never dreamed of, try TotalView 6 free at www.etnus.com. _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
