Hi, I've recently purchased an Epiphany Acoustic O2 sound card, basically it's an USB DAC with a headphone amp. Problem is, the sound is barely audible. I've tested the amp independently (using the line in) and it works fine. So now I am trying to set up a preamp in alsa, but somehow I can't get it working. The config is below. I'd be grateful for any hints or ideas. Thanks, rad0 ------- asoundrc --------------------- # External USB DAC pcm.DAC { type hw card DAC } ctl.DAC { type hw card DAC } # Preamp on external DAC pcm.DAC { type plug slave.pcm "softvol" } pcm.softvol { type softvol slave { pcm "dmix" } control { name "preamp" card DAC } min_dB -5.0 max_dB 20.0 resolution 6 } ------- asoundrc --------------------- ++ Connection closed by remote ghost.