I run the command below and it works, it plays the wave file: $ aplay -D default shared/testing.wav Playing WAVE 'shared/testing.wav' : Signed 16 bit Little Endian, Rate 11025 Hz, Mono However the command below fails: $ aplay -D hw:0,0 shared/testing.wav Playing WAVE 'shared/testing.wav' : Signed 16 bit Little Endian, Rate 11025 Hz, Mono aplay: set_params:901: Channels count non available I thought it was posible to select audio channels this way using aplay. No .asoundrc here. Any ideas? Cordially, Ismael -- mí, myself et moi http://lamediahostia.blogspot.com/ http://www.flickr.com/photos/ivalladt/