Helge Fredriksen wrote: > Ok, here's what I found out: > > Since these cards seem to lack the support for doing frequency > conversion in HW, you simply need to use the alsa plugin > plughw instead of hw when referring to the card: > > arecord -Dplughw:0 test.wav > aplay -Dplughw:0 test.wav > > Then alsa do the conversion for you... Strange though that giving hw > the argument > -r 48000 didn't seem to work either. > > Credit to Florian Bomers for helping me out. > > Regards, > Helge Fredriksen > Are you using any kind of sound server? I have a Rev5.1 and I use direct library calls to set the internal hardware frame rate to one supported in hardware without any problems whatsoever, *unless* something else has taken over the card. I use plughw because it does format conversions automatically which is handy but no frame rate conversion is done unless required. 48000 is a framerate that the card supports, so there should be no conversion required (others are 44100, 64000, 88200, 96000, 176400, 192000) . When you use hw instead of plughw, you are taking responsibility for all conversions to the cards internal representation. The Rev5.1 uses signed 32 bit integers internally. Most wav files are signed 16 bit integer files. plughw will convert, hw won't.
At least that's my understanding. Could be wrong. :-) ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
