Chapter 11: Reference Section 253
SYSEX TUTORIAL
HOW TO EDIT A GLOBAL PARAMETER
Parameter data editing is accomplished using the format described on
page 234.
F0 System Exclusive Status Byte
18 E-mu Mfg. ID
0C Morpheus Product ID Byte
dd Device ID 0-15 (usually 00)
03 Command ID - Parameter Data (from Command Summary)
pl Parameter Number ls byte
pm Parameter Number ms byte
vl Parameter Value ls byte
vm Parameter Value ms byte
F7 EOX
Example: Change the Pan value of the Basic channel to “P”.
1) We need to find the preset parameter number for Channel Pan in
Hexadecimal. This will be the Parameter Number portion of the mes-
sage.
The Channel Pan parameter is found on page 249. This is the actual
number and not an offset, so we only need to convert it to 14-bit 2’s
complement. The parameter number for Channel Pan = 258.
a) 258 ÷ 128 = 2 r2
b) 2 in Hex = 02 = msb
c) 2 in Hex = 02 = lsb
2) The least significant byte is always sent first. The MIDI SysEx string now
looks like this: F0 18 0C 00 03 02 02 XX XX F7. We’re still missing the
value data to select the pan position.
3) From the table on page 249 you can find out that “-8” corresponds to
Preset Pan. For negative numbers, add 16384 to the original negative
value. 16384 - 8 = 16376.
4) Next we convert this number into “nibblized” Hex form.
a) 16376 ÷ 128 = 127 r120
b) 127 in Hex = 7F = msb
c) 120 in Hex = 78 = lsb
5) The completed message is: F0 18 0C 00 03 02 02 78 7F F7.
One More
If we wanted to change the Basic Channel to 5, the message would be:
F0 18 0C 00 03 00 02 04 00 F7. Basic Channel is two parameters before
Pan in the list, Subtract 2 from the Parameter Number (02 02 - 2 = 00
02).
MIDI channels begin at 00; therefore channel 5 would be 4.
Convert 4 into Hex = 04. (LSB first = 04 00.)
••• See MIDI Mode in the
Master Menu for additional
information on Device ID.
••• Note: Changing Basic
Channel Pan is the same as
changing Midimap Pan.
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