Map MIDI / MPE Channels to MC Channels The mc.miditarget object lets you use the channel number of incoming MIDI data (in the form of midievent messages produced by the midiparse object) to target individual instances of objects inside the MC wrapper. Normally MIDI channel 1 is mapped to MC channel 1, but mc.miditarget also has an MPE mode that maps MPE global MIDI channel 1 to MC channel 0 (targeting all instances) and MIDI channel 2 to MC channel 1. Objects that can work with messages from mc.miditarget include mc.vst~ and mc.sfizz~. Cycling '74 MSP MC midievent Message Connect the rightmost outlet of midiparse that produces midievent messages to the inlet of mc.miditarget. TEXT_HERE setvalue Index Followed by midievent Message The outlet of mc.miditarget sends the word setvalue followed by an index corresponding to the MIDI channel in the incoming midievent message. Following the index, the word midievent is followed by contents of the message.
Example: With input midievent 144 60 64 (a note-on on MIDI channel 1 with note number 60 and velocity 64), mc.miditarget will output setvalue 1 midievent 144 60 64. TEXT_HERE TEXT_HERE Map MIDI channels to MC channels When mc.miditarget receives a message starting with midievent followed by a list of numbers specifying a MIDI message, the message is repeated to the outlet precedeed by setvalue and a channel index number obtained from the MIDI channel of the MIDI message. MPE Mode The mpemode attribute determines the channel mapping behavior of mc.miditarget. The MPE specification uses MIDI channel 1 for events that affect all notes; channels 2 - 16 are used for note events and per-note after touch, pitch bend, and control changes.
When mpemode is enabled, MIDI messages on channels 2 - 16 are mapped to MC channels 1 - 15. MIDI messages on channel 1 will be mapped to MC channel 0, which targets all instances inside an object using the MC wrapper. When mpemode is disabled, MIDI messages on channel 1 are mapped to MC channel 1, MIDI channel 2 is mapped to MC channel 2, and so on.