At Fri, 25 Apr 2008 16:19:38 +0200, I wrote: > > At Thu, 27 Mar 2008 01:58:50 +0100, > Rene Herman wrote: > > > > On 26-03-08 23:57, Bill Unruh wrote: > > > > > On Wed, 26 Mar 2008, 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 > > > > > > AFAIK, alsa frequency conversion is pretty primative ( linear > > > interpolation) which produces a huge amount of noise/distortion. > > > > The default is, but if you install the alsa-plugins package (and > > libsamplerate) and add a line > > > > defaults.pcm.rate_converter "samplerate" > > Or "speexrate". This is usually much faster. And forgot to write: you don't have to add anything to asoundrc for speexrate plugin. Install it, then alsa-lib will pick it up automatically. Takashi ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
