Ok look like I found my answer, need to wait for ALSA 1.0.14 http://www.qbik.ch/usb/devices/showdev.php?id=3925
---- Details for: C-Media CM6501 Status partially supported ( Audio chip ) ( Category: Audio ) ID: 0x0d8c:0x0201 Driver: snd-usb-audio Linux-USB link: http://www.alsa-project.org/ Vendor link Comment: Fully supported in ALSA 1.0.14. In ALSA versions 1.0.13 or earlier, stereo 48 kHz data will be played at 96 kHz, i.e., garbled. ---- Based on this could assume 48kHz mono is ok, would there be a way of forcing the audio to be read in mono rather than stereo? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]