Thanks Eric, your description is very helpful.
By concatenating to CC#'s do you mean that I would need to program my MIDI controller so that each pot sends the same data to two channels simultaneously (for example to CC#0 and CC #32?)
And that's it?
Ithai
--- In motm@yahoogroups.com, Eric Brombaugh <ebrombaugh@...> wrote:
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> MIDI commands are sent as groups of 1, 2 or 3 8-bit bytes. The top bit of every byte is a flag which indicates if it is a status or data byte. A pitch wheel command sends a 14-bit value as a sequence of three bytes: a status byte that says it's a pitch wheel command, followed by two data bytes. Since the top bit of each data byte is already used as the status/data flag, seven remain so two bytes gives 14 bits. The first of the two data bytes is the MSB (most-significant byte), and the second is the LSB (least significant byte).
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> Continuous controller commands are always three bytes long: the status byte indicating it's a continuous controller command, followed by two data bytes. One of the data bytes indicates which CC# it is, the other contains the 7-bit data for that CC. If you want more than 7 bits you'll need to concatenate two CC#s together in your MIDI decoder as is done in some synths.
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> Eric
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> --- On Thu, 3/19/09, ithaib <ithaib@...> wrote:
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> From: ithaib <ithaib@...>
> Subject: [motm] Midi MSB/LSB
> To: motm@yahoogroups.com
> Date: Thursday, March 19, 2009, 10:15 AM
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> Hi all,
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> I was wondering if someone could explain MSB/LSB and how I can use it. I've been googling it and I don't quite get it.
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> I'm building a 16 channel MIDI controller to control continuous controller messages. Now, MIDI messages are 7-bit, right? So, how does Pitch work? From what I understand it's a 14 bit message. The data is recorded on 2 channels and takes advantage of MSB and LSB, right? Otherwise we would hear the note stepping up and down and not doing it smoothly...
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> So is this something that's set up in the sequencer that's receiving the messages or is it the controller that's sending the messages? I want to be able to record 14 bit controller data on any channel - basically have all the pots act just like pitch data but on different continuous controller channels. Possible?
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> I hope this is not confusing. I'd really appreciate any insights...
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> Thanks,
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> Ithai
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