update: links to repo

Signed-off-by: Stephen L. <lrq3000@gmail.com>
fix: UI responsiveness during sound loading (as good as before)

Signed-off-by: Stephen L. <lrq3000@gmail.com>
fix: Single Instrument should never be disabled (used as base instrument when multi-instruments is enabled)

Signed-off-by: Stephen L. <lrq3000@gmail.com>
fix: removed useless imports

Signed-off-by: Stephen L. <lrq3000@gmail.com>