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" in /etc/alsa.conf or ~/.asoundrc, things should be better (untested advice). Rene. ------------------------------------------------------------------------- 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@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
