Midiplayer and sequencer

[villemt]

Midiplayer features in 1.40.50: Displays for used tracks and bars, piano roll editor, synthesizer/wave parameter editor (envelope,etc..), notation display, loading/saving midi filetypes 0 (play) and 1 (edit), instrument mappings by midi channel, by instrument num. and also general midi mapping. Also a mixer view for 256 instruments with volume/pan and main controls with echo.