Thank you - I've done as you suggested.

I'm using an Alesis USB Mixer as my audio interface and the ASIO driver is 'Alesis USB Audio Device'. It was set at '128 samples - 4.9ms / 17.2ms' so I've changed it to '256 samples - 7.9ms / 29.4ms'.

This seems to have stopped the interferance with the playback but not the the beep and faltering when editing effects or re-positioning the window during playback.

I'm not sure when it started happening but it was doing it before I updated from 2011 to 2012 a couple of days ago - I was hoping the upgrade would cure it!

If they're of any relevance, the Track Buffer is set at 65536 and the Buffer size for Edit/Save is 512 Byte.

Your help is much appreciated.

Last edited by GodfreyY; 03/18/12 07:05 AM.