Roland HP 237R - Manual (Page 32)

32
Connecting to MIDI Devices
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 237R to an external MIDI device.
■ Disconnecting the HP 237R’s
keyboard and internal sound
generator–Local On/Off
When the HP 237R is connected to a MIDI sequencer or the
like, set it to Local Off.
As shown in the diagram, 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).
fig.8-04.e
This sets it to Local On:
fig.8-05.e
This sets it to Local Off:
fig.8-06.e
NOTE
Be aware that if you set your instrument to Local Off when no
external MIDI device is connected, there will be no sound.
■ Switching Local On/Off
Local On is set when the power is switched on.
While holding down the [Piano 1] button,
[Piano 2] button, and [Harpsichord] button,
the “B4” note to turn the setting On, or
press the “C5” note to turn the setting Off.
fig.8-07.e
If the HP 237R is connected to a Roland MT series (except
MT-80s), it is not necessary to make the Local Off setting.
When the power is turned on, the MT series will transmit a
Local Off message. If you turn the power on in the order of
first the HP 237R and then the MT series, the HP 237R will
automatically be set to Local Off.
(1)
MIDI
MIDI MIDI
MIDI
(2)
IN
IN OUT
OUT
Sequencer
Memory
Sound
Generator
Each note played
is sounded twice
Thru function On
Local On
Local On
Sound is emitted
Sound Generator
Local Off
No sound produced
Sound Generator
120 168 Tempo Beat 208 40 60 80 96 3 6 0 2 4 Play Rec Demo Song Sound On / Off
Metronome
Strings Piano 1 Piano 2 chord
Harpsi-
phone Organ
Vibra- Pipe
Piano 1
Electric
Piano 2
Electric
Tone
Local Off Local On