MIDI • MIDI Basics
7• 3
MIDI Messages
MIDI allows for several different kinds of messages, each with a different purpose:
MIDI Program Changes—Program change messages tell a device to switch from
one sound or setup to another. With POD
XT, program changes change from one
Channel Memory to another. So, for instance, when POD
XT receives program
change number 1, it will select Bank 1, Channel A. When it gets program change
number 2, it will select Bank 1, Channel B. And so on, as the chart in Appendix B
shows.
MIDI Continuous Controllers—MIDI continuous controller messages (CC for
short) allow you to control a device’s parameters in real time. So, for instance, you
can use a MIDI controller to vary the setting of POD
XT’s DRIVE control, or the
R
EVERB level. Each of PODXT’s parameters are mapped to a MIDI controller, so you
can take full control of your POD
XT. The chart in Appendix C lists each PODXT
parameter, the controller assigned to it, and how that controller affects POD
XT. Note
that the wah and volume pedals of the FBV and FBV Shortboard also transmit MIDI
controller messages via MIDI when used with your POD
XT.
MIDI SysEx Commands—Sysex stands for “System Exclusive.” SysEx commands
are special commands that only a particular device understands—they are ‘exclusive’
to that device—as opposed to the more generic kind of program, controller, and
other messages that almost all MIDI devices understand. POD
XT uses SysEx to
transmit its Channel Memories to another device, or to receive new Channels from
another device. This exchange of data is typically called a “dump.” Note that POD
XT
always accepts SysEx data on any MIDI channel; your choice of MIDI channel still
determines what channel your POD
XT will send Sysex data on.
PODxt Manual Book RevC.book Page 3 Friday, August 29, 2003 5:43 PM
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