Changed terms used to describe frames / periods.
Added mute during recording.
Stop wrap-around of track selection (e.g. no longer select first track when press down key on last).
Reduce inline calcuations by using more variables.
Add Overrun monitoring. (Previously erroneously showing underruns.)
Add indication of import progress (when headers need changing).
No longer perform mix-down if extending file length.
Reduced quantity of individual file writes (and associated seeks) during record by reading to buffer, modifying buffer then writing buffer in one hit.
Changed default path to /media/multitrack.