Aphex 5200 RC Interface - Manual (Page 6)

MIDI
Interface Guide
Using MIDI
Direct MIDI SysEx Strings
Direct MIDI SysEx strings are exactly the same as the parametric strings used for indirect MIDI control (described
later). When filling in the three bytes in the grayed area, refer to reference data at the end of this chapter.
Understanding Ch, Dev and Net Offsets
Please observe two important facts about MIDI Channel, Device, and Net Numbers.
1. All three are used in decimal form on the 1788A and 188. Ch and Dev go from 01 to 16 and Net goes from
001 to 128. You will need to convert decimal to hexadecimal for use in SysEx strings. A handy conversion table
is located in this chapter’s reference data.
2. Channel, Device, and Net numbers in the SysEx strings must be programmed with an offset of -1 from the
numbers that are indicated on the 1788A or 188 front panel readout. For example, if the 1788A or 188 is set to
Ch 01, Dev 02, and Net 003, the SysEx code would look like 00 01 02, not 01 02 03. This may be confusing at
first, but you will find it quickly becomes easy to deal with.
Setting Up The Controller
The method of programming a MIDI control varies from product to product. To successfully interface a MIDI
control surface to an Aphex 1788A or 188, you will need to learn the control surface. Once you have determined
the way to program your controller, you can begin applying SysEx strings to the controls. We will next illustrate
this process by using a general purpose MIDI controller.
Here’s how we’re going to set it up. The MIDI controller will be set up to control the Input Gains of all eight
channels of a 1788A or 188. The push buttons under each fader will be programmed to activate/deactivate the
Mutes of each channel.
F0 00 00 38 xx xx xx xx xx F7
SysEx Start MIDI Channe
l
MIDI Device Command Mic Channel Va
lue
SysEx End
(00h to 0Fh)
Offset by -1 from Aphex Pre
Channel Number
(00h to 0Fh)
Offset by -1 from 1788A
Device Number
(00h to 0Fh)
Offset by -1 from 1788A
Net #
See Table
Mic Channel (01-08)
See Table
Aphex MIDI I.D.
xx
Net Number
11- Byte Direct MIDI SysEx String