I agree that it's a good idea to create a "usb audio" thread. But the question was given in this thread so the answer follows. I repeated the experiment with pulseaudio. 1. Code: pactl load-module module-alsa-sink-old sink_name=sink.hw2 device=hw:1 rate=48000 fragment_size=1920 fragments=4 alt_fragment_size=960 alt_fragments=2 2. pactl move-sink-input 2 7 (2 is nokia-music, 7 is newly registered sink) 3. playing music using maemo media player - nothing happens no sound and it doesn't advance 4. pactl move-sink-input 2 2 (returned to normal setting) - playback works 5. connected usb device 6. verified it works in moc 7. pactl move-sink-input 2 7 8. attempt to play music 9. device reboots USB device is m-audio mobile pre. pulse configuration can be verified with pactl list. pactl is in pulseaudio-utils package
pactl load-module module-alsa-sink-old sink_name=sink.hw2 device=hw:1 rate=48000 fragment_size=1920 fragments=4 alt_fragment_size=960 alt_fragments=2