On Sat, Jan 02, 2010 at 12:21:46AM +0800, Sam Spilsbury wrote: > I have already tried using :alsa:samplerate=128000 but that just > produces no audio. I also tried adevice=/dev/*dsp* where *dsp* is > each one of the dsp devices and that produces no audio as well. For MPlayer you at least need immediatemode=0 , you'll probably have to set adevice for ALSA as well, and I can't imagine that your microphone supports a sample rate of 128000 unless you got it from an alternative reality where dogs or a creature with similarly good hearing rules the world...