On Thu, 4 Jul 2013, James Stone wrote: > Apologies - I realised I hadn't also applied the 1ms usb patch. With that > applied, it will start OK at 256, but not at 128 frames/period. (on earlier > kernels it can start at 64 frames/period). > > Output file (for 128 frames/period) attached. The part of the usbmon trace that you attached doesn't show any audio input at all -- no errors, nothing. Here's a hint: Look through the usbmon file for lines containing " E " -- those are the errors. Extract a portion starting back from there about 100 lines, and include some of the " E " lines so we can see them. Another hint: The important lines are the ones containing "Zi:1:002:2" -- the actual string may be slightly different, but it will definitely contain "Zi" and it will match the " E " lines. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html