initc7 — Initializes the controller used to create a 7-bit MIDI value.
ichan -- MIDI channel (1-16)
ictlno -- controller number (0-127)
ivalue -- floating point value (must be within 0 to 1)
initc7 can be used together with both midic7 and ctrl7 opcodes for initializing the first controller's value. ivalue argument must be set with a number within 0 to 1. An error occurs if it is not. Use the following formula to set ivalue according with midic7 and ctrl7 min and max range:
ivalue = (initial_value - min) / (max - min)