Yamaha RX21 - Manual (Page 42)

The following parameters must be set, in order to carry out the various MIDI control
MIDI Parameters
operations that we’ve just discussed.
1. RECEIVE CHANNEL (1 through 76)
MIDI information is transmitted on 16 channels, and for key number reception, the
RX21 must be set to the same MIDI channel as the MIDI instrument(s) to which
it is connected. The sequencer or music computer used to transmit the MIDI data
might, for example, be transmitting melody data to a synthesizer on channel 1, and
rhythm data to the RX21 on channel 2. The RX21 must therefore be set to receive
on channel 2, to prevent the melody data from triggering the rhythm machine.
To set the channel number, press the MIDI button twice. “RECEIVE CH=cc" will
appear on the LCD (“cc" being the channel number). To change the channel
number, press the +1/YES button to increase the number and -1/NO button to
decrease it. To exit this mode, press any main function key. The MIDI Receive
Channel that you have selected will remain even after the RX21 power is turned
off.
MIDI Receive Channel Setting (Example: set to channel 2)
2. CHANNEL INFORMATION AVAILABLE
In this mode, the RX21 receives MIDI key number data from an external source;
as described in KEY NUMBER RECEPTION at the beginning of this chapter. A key
number corresponds to the number (pitch) of a key played on a synthesizer key-
board. Middle C, for example, is MIDI key number 60. A MIDI sequencer, for ex-
ample, outputs key numbers to a keyboard; causing the synthesizer to play the
corresponding notes.
The RX21 has 9 different instrument sounds. Each of these has been assigned a
MlDI key number between 45 (A2) and 60 (C3, or MlDDLE C).These are as follows:
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