Pioneer Dj DJM-A9 4-Channel Digital Pro-DJ Mixer with Bluetooth (Black) - Manual (Page 58)

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USB/MIDI
3. MIDI ON/OFF button
Turns MIDI on and off. The button lights up when it’s turned on.
4. MIDI START/STOP button
Sends the MIDI start/stop messages. The button lights up after the start message is sent,
and turns off after the stop message is sent.
Controlling MIDI software
• Install MIDI software and configure the audio and MIDI settings on a PC/Mac or mobile
device beforehand.
1 Connect a PC/Mac or mobile device to the unit.
• Connect a PC/Mac to the [ A ] or [ B ] (USB) port, or connect a mobile device to
the mobile device connection terminal in the MULTI I/O section (page 22).
2 Launch the MIDI software.
• This completes the sequence if you’re using a mobile device.
3 Press the [MIDI ON/OFF] button to turn MIDI on.
The sending of MIDI messages starts.
• Press the [ MIDI ON/OFF ] button again to turn MIDI off and stop sending MIDI messages.
• The MIDI timing clock (BPM) is sent even when the [ MIDI ON/OFF ] button is switched off.
• Press the [ MIDI START/STOP ] button to send the MIDI start and stop messages
alternately. The messages are sent even when the [ MIDI ON/OFF ] button is switched off.