![]() ![]() As an example consider this device: which offers 192 keys and currently has to work around the limitations of midi by using 2 midi channels to use all the keys. Simultaneous events in MIDI must be sent as a string of serial commands. The note will sound until a message to turn off the same note number is received, since MIDI note messages do not include rhythmic durations. Note that direct pitch control per note does not really feel like a proper solution, as it will result in a single midi note number being used for addressing several frequencies, which (as far as I understand) makes it impossible to play 2 or more of those frequencies simultaneously.Įdited to add: this is not a "theoretical problem" anymore. In this case the maximum velocity of 127 (binary 01111111) is sent. The topic of more than 128 note numbers comes up in microtonal/xenharmonic contexts much faster than in traditional music. Adding or subtracting 1 is equivalent to moving one semitone higher or lower, respectively. This is enough note numbers for ten full octaves and a partial 11th octave, which encompasses the normal range of human hearing and of all common acoustical instruments. ![]() Note numbers range from 0 to 127 note 0 is a C, note 1 a C, note 2 a D, and so on. A note can be selected by either typing in a number or pressing a key on the virtual keyboard. The MIDI standard assigns note numbers to the notes of the chromatic scale, for the purpose of informing a synth what note to play in a note on message. With so many other specs becoming better this seems like some kind of oversight. Play Note for Beats uses the MIDI note system. ![]() Looking at the midi 2.0 note on/note off messages, do I understand correctly that it still supports only 128 distinct note numbers? Technically one could abuse the 'attribute' to add extra numbers but that would be a manufacturer-specific extension, so not much hope for cross-device compatibility (and if you use the attribute for note number, where do you then specify the tuning information?). If we have a particular frequency or midi note number, then range or sweep the timbre based on tables which span from the minimum to the maximum bandwidth allowable for that frequency in order to avoid aliasing, using a relatively low frequency, we are able to perceive a 'filtered' effect. ![]()
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