Fixes recording. Changed record latency to 3ms.
Calculate record head offset from record and playback latencies.
Changed monitor mixdown to 6dB steps to reduce CPU usage.
Added record mode to allow manual punch in/out of several tracks.
Play indication now has 2 states (PLAY / STOP) and record enabled indicated by red colour.
Added 'c' key shortcut to pan centre attenuated to avoid distortion.
Added 'M' keyboard shortcut to toggle mute on selected channel and set all other channels to same mute state.
Added 'G' shortcut to toggle record mode - may change.
Changed shortcut for clearing errors to 'e'.
Added '+' & '-' keyboard shortcuts to adjust record head offset - for debug only, may remove in future.
Disabled resampling record and replay audio.
Disabled writing record head offset to configuration file.
Updated README.