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Each byte of data begins with a start bit and ends with a stop bit, for an effective transfer rate of 3,125 bytes per second. The MIDI protocol is unidirectional at 31,250 bits per second. One is a shield, another is a current loop, and the third carries the data.
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A MIDI cable uses 5-pin DIN connectors, but only three of the connectors are used. MIDI defines a protocol for passing digital commands through a cable. The MIDI specification is maintained by the MIDI Manufacturers Association (MMA), which has a Web site at. MIDI is an extremely important standard in the field of electronic music. MIDI is a protocol for connecting electronic music instruments among themselves and with computers. So from my view, middle C should be even higher in midi-value, not lower.Īlthough, in retrospect constraining to a 7-bit value maybe wasnt the best in the first place and even 1 extra bit would make the "range" question totally irrelevant.The Musical Instrument Digital Interface (MIDI) was developed in the early 1980s by a consortium of manufacturers of electronic music synthesizers. (when using harmonic automation instead of roll notes to compose a melody/harmony over a very low-frequency, not-present fundamental) i can't say the same for high frequency values which seem completely useless. I have found myself in certain situations wishing for midi values below 0. While 20Khz (more like 15-17 realistic for most people) is the audiable limit pretty much everything above 5Khz can have no timbre to speak of and decays into a disgustingly annoying sine. at least the low octaves generate a ton of audiable harmonics which are definitely useful in synthesis, which midi primarily concerns itself with. and well, at least -1 somewhat implies the inaudability of the fundamental here.Īnd to be fair, the high octaves are just as useless (if not more so) than the low octaves. The Virginia Tech link given on the cockos (Reaper) forum implies that it was arbitrary, but they also make some mistakes with the C4 bit, so I'm not sure how well researched that is.ĭepending on which kit you ask, middle C is either C4 or C5. Maybe though it came prior to MIDI in voltage controlled synths where you've got 60 cycles or 120 volts or whatever coming out of the wall - it may have to do with the midpoint of something like that as well? The lower end may provide ways to access LFO type waves or something.īesides, those really high sounds are annoying - it's more fun to play with a really low sound where the vibrations are breaking apart :-) I suppose, you could "shift up" the frequency range an octave as your chart basically does, as we can't hear that lowest octave anyway, and we'd be out of our range on the top end an octave up.īut the range is probably because, if you have a saw wave at 10k, you're not going to really be able to hear the 1st overtone - so anything beyond 10k is going to sound like a Sine wave pretty much. E makes sense as the 64 (or 63 rough midpoint for 0-127) as it's midway between A (a 5th below) and C (a 6th above) as the lowest and highest notes on the piano. MIDI notes range from 0-127, from below our range of hearing (at 8 Hz!) to G9 at about 12.5 kHz:ġ28 units puts 64 in the middle - "middle" C is about in the center of all that at 60.