Keyswitching is a tool which enables you to access all the Techniques within a patch on one channel strip (MIDI track). In BBC SO Discover, by default, the notes used to Keyswitch are C-2 to D#-2. Write these into your MIDI Notation, as you would a normal note, and you can switch between different playing techniques.
If your MIDI keyboard does not let you go down to C-2, and you want to play-in the Keyswitches- you can of course move them by dragging the Keyboard Icon.
