Roland HP 137 - Connecting to MIDI Devices; Making MIDI Connections; MIDI Connection Cautions

HP-137
4. Connecting to MIDI devices
Read this chapter if you wish to connect the HP-137
to an external MIDI devices.
If the HP-137 is connected to a MIDI sequencer, such
as one from the MT series, you can record your play-
ing or have the external module, synthesizer, etc.,
reproduce the notes you play on the HP-137's key-
board. When the HP-137 is connected to an MT series
sequencer, the rich variety of sounds built into the
MT can be played from the keyboard of the HP-137.
About MIDI
MIDI, short for “Musical Instrument Digital Inter-
face,” was developed as a standard for the exchange of
performance data between electronic instruments and
computers.
The HP-137 is equipped with MIDI connectors to
allow such exchange of performance data with exter-
nal equipment and devices.
About the MIDI connectors
MIDI In connector—Use a MIDI cable (sold sepa-
rately) to connect from here to the MIDI Out connec-
tor on the external MIDI device.
MIDI messages sent from connected external equip-
ment will be received here. As a result, the HP-137 will
produce sound, change tones, or perform other oper-
ations.
MIDI Out connector—Use a MIDI cable (sold sepa-
rately) to connect from here to the MIDI In connector
on the external MIDI device. Performance data detail-
ing what has been played on the keyboard, and other
data, such as that generated when a pedal is depressed,
is sent out from here to external MIDI devices.
Making the connections
Note: To prevent malfunction and/or damage to speakers
or other devices, always turn down the volume, and turn
off the power on all devices before making any connections.
1. Turn the volume down completely on all equip-
ment.
2. Turn off the HP-137 and any other devices to be
connected.
3. Use MIDI cable (sold separately) to connect the
external MIDI device to the MIDI connector on the
HP-137.
Take a look at the connection examples below.
4. You should also make the settings below as needed.
For details on making MIDI-related settings for the
HP-137, refer to “Cautions when connecting an exter-
nal MIDI device”.
5. Turn on the power to all equipment.
6. Adjust the volume.
Connecting to a sequencer (Roland MT series)
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Note: The MT-80s has no MIDI Out connector.
Connecting to a MIDI sound module
Sound module
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Cautions when connecting an external
MIDI device
Here we will explain the “Local On/Off” and “Omni
On/Off” settings that you need to be aware of when
connecting the HP-137 to an external MIDI device.
Disconnecting the HP-137's keyboard and internal
sound generator—Local On/Off
When the HP-137 is connected to a MIDI seguencer
or the like, set it to Local Off. As shown in the dia-
gram, the data that is produced when you play the
keyboard will reach the sound generator by two
routes, (1) and (2), causing each note to be played in
duplicate. To prevent this, select the Local Off setting
to cut route (1).
(1) Local On
Sequencer
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Each note played
is sounded twice
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