I'm also looking for some usb solution for linux. Does the alsa driver automatically adjust sampling rate to the material being played ? Are you able to play hi-res (i.e. 24bit/192kHz) files bit-perfect with E-MU 0204 ? Would you please be so kind to post results of this command : aplay -v -D plughw:0,0  some_hires_file.wav (of course replace device name and filename with right values). Thanks in advance.