124Omni Off (0)
125Omni On (0)
126Mono On
127Poly On (0)
6.3B Mode Messages
There are two messages that determine the MIDI mode (i.e., how the D4 will receive MIDI data). The “Omni” message determines how many channels will be recognized. Omni On means that data from all channels will be received; Omni Off limits the number of channels, usually to one.
The “Mono/Poly” message deals with voice assignment within the synthesizer. In Mono mode, only one note at a time plays in response to voice messages; in Poly mode, as many voices can play notes as are available to play notes.
The D4 implements two different MIDI modes.
Omni On/Poly (Mode 1) The D4 responds to MIDI data occuring on any channel.
Omni Off/Poly (Mode 3) The D4 is tuned to a single MIDI channel, from 1 to 16.
6.4 SYSTEM COMMON MESSAGES
Intended for all units in a system, some of these messages are:
Song Position Pointer This indicates how many “MIDI beats” (normally a 16th note) have elapsed since a piece started (up to 16,384 total beats). It is primarily used to allow different sequencers and drum machines to
System Exclusive This message (called sys ex for short) is considered “exclusive” because different manufacturers send and receive data over MIDI which is intended only for that manufacturer’s equipment. Example: Sending a D4 message to an Ensoniq
Timing Clock A master tempo source (such as a sequencer) emits 24 timing messages (clocks) per quarter note. Each device synchronized to the sequencer advances by 1/24th of a quarter note when it receives the clock message, thus keeping units in sync after they’ve both started at the same time. Many devices subdivide this clock signal internally for higher resolution (e.g., 96 pulses per quarter note).
Start Signals all
Stop Signals all
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