17 Jul
2006
17 Jul
'06
6 a.m.
Stephen Cameron wrote:
The manual fails to mention what the Bank Change
message is
(probably because it is "standard MIDI stuff.") It is 0xB0
(or 0xBn, where n is the channel the device receives basic
messages on.)
Bx is the Control Change command. The two halves of the bank number are
just two controllers, 0 and 32.
It requires TWO bank select commands to select a bank.
One
to set the MSB, and one to set the LSB. You can't set them
both with one command (which is what I was trying to do that
didn't work.)
You can omit the command byte (called "status" in MIDI) when it is
identical to the last one, so you could use
B0 00 msb 20 lsb
This feature is called "running status".
0xB0 0x00 0xf3 // 0xB0 0x00 means "set bank
MSB" 0xf3 is the
// value to set it to.
This is not a valid MIDI command. The highest bit of each byte is used
to differentitate between command and data bytes, so data bytes must be
no greater than 127 (0x7f).
The manual should document somewhere what the MSB value for this bank
is, but it's certainly not F3.
To learn more about MIDI, have a look (or more than one) at
<http://www.borg.com/~jglatt/>.
HTH
Clemens