MIDI control
■ MIDI channel setting function
MIDI control signals (such as program change and control change messages, see below) are always sent with a
certain channel number (1 Ð 16). The receiving side can select which channels to receive.
MIDI control signals can be divided into several types. The 1204 can only process so-called program change
messages and control change messages. Program change messages can be used by the 1204 to switch memory
numbers in memory mode. Control change messages can be used by the 1204 to alter effect settings in memory
mode.
In the factory default condition, the 1204 is set up to receive all MIDI channels. In MIDI terminology, this is called
the "OMNI Mode On" condition. If desired, the setting can be changed as follows.
1. Use the MODE key to select the memory mode.
2. Press the MIDI key to activate the MIDI channel setting function.
The current MIDI channel setting and the indication
CH
"CH" flash alternately on the display.
3. Use the ▲ and ▼ keys to select the MIDI channel you want to receive.
Note: The following settings are available.
• Receive all MIDI channels: AL
• Receive individual MIDI channels: 1 – 16
• Disable MIDI channels: – –
Caution: If you want to cancel the process, you can press the CANCEL key at this point. If you go ahead with
the MIDI channel setting function, the earlier setting will be changed.
4. To complete the MIDI channel setting function, press the MIDI key once more. The function is
terminated and the display reverts to showing the memory number. The selected MIDI channel setting is
automatically stored.
Note: The MIDI channel setting is retained also when the unit is turned off.
■ Using MIDI to call up stored effect settings
Effect settings stored by the 1204 can be called up from an external MIDI device. To call up stored settings, it
suffices to specify the memory number.
To call up an effect setting via MIDI, proceed as follows.
1. Connect the MIDI OUT jack of the external device to the MIDI IN jack of the 1204.
Turn all devices off before making this connection.
2. When connections are established, turn on the devices and use the MODE key of the 1204 to set it to the
memory mode.
3. Set up the 1204 so that the MIDI receive channels match the MIDI send channels of the external device.
4. Send program change messages from the external device to switch memory numbers at the 1204.
Note: The relationship between MIDI program change messages and memory numbers of the 1204 is as
shown below.
■ 21 ■
Program change messages over 100 are not
accepted by the 1204.
