Code review comment for lp:~ywwg/mixxx/features_xwax2

Possible reason (haven't tested to confirm yet):

Last night I was playing with my main sound card as output and my usb sound card as input. Normally, I use my USB card as both input and output. For my laptop, though, the USB bus doesn't seem to have enough bandwidth to do this.

So, radiomark told me on IRC that the samples weren't syncing up because of clock differences:

> radiomark | If you imagine, it has to synchronise playback (which runs
> | from the soundcard's outbound clock) with the relative and
> | absolute vinyl data (which runs on the clock of the spinnin
> | vinyl)

I'm investigating this a bit. Maybe you already implemented it and it's something else... I'll take a look.