MIDI/Score Interoperability opcodes

The following opcodes can be used to design instruments that work interchangably for real-time MIDI and score events:

• midichannelaftertouch
• midichn
• midicontrolchange
• mididefault
• midinoteoff
• midinoteoncps
• midinoteonkey
• midinoteonoct
• midinoteonpch
• midipitchbend
• midipolyaftertouch
• midiprogramchange.

Adapting a score-activated Csound instrument.

To adapt an ordinary Csound instrument designed for score activation for score/MIDI interoperability:

• Change all linen, linseg, and expseg opcodes to linenr, linsegr, and expsegr, respectively, except for a de-clicking or damping envelope. This will not materially change score-driven performance.
• Add the following lines at the beginning of the instrument definition:

   ; Ensures that a MIDI-activated instrument
   ; will have a positive p3 field.
   mididefault 60, p3 
   ; Puts MIDI key translated to cycles per
   ; second into p4, and MIDI velocity into p5
   midinoteoncps p4, p5
  

  Obviously, midinoteoncps could be changed to midinoteonoct or any of the other options, and the choice of p-fields is arbitrary.

MIDI Realtime Input/Ouput command line options

New MIDI I/O flags in Csound 5.02, can replace most uses of these MIDI interop opcodes, and make usage easier.