Boss Dr.Rhythm DR-550 Owner's Manual page 79

[3]Connecting With External MIDI Devices
© Refer to the diagram above, and make the connection with the
external device.
2) Set the MIDI channel and Note Numbers so they match what is used
by the external device (pad controller, keyboard, еїс.).
if you now play the external pad controller or keyboard, you will produce sound
thatis identical to what you would obtain if you tapped the DR-550's Key Pads.
[Hint 1]
Through making connections as in the above, you can perform Real-time Write.
After carry out the procedures necessary for Real-time Write (see р. 28), you
can use the keyboard or external pad to enter data into a rhythm pattern, much
like you would if you tapped the DR-550's Key Pads.
* |n such cases, Step Write is not available.
[Hint 2]
If you set the Sync mode to MIDI Sync, the MIDI device will have control over
Start/Stop. However, while in the Pattern Edit mode you will not be able to use
Continue Start(command which starts a rhythm pattern from an intermediate
point).
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