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Connecting to MIDI Devices
Transmitting/Receiving
Sound Selection Data–
Program Change
Program Changes are messages that tell an instrument to
“switch to sound number x.”
When the other device receives this message, it will switch to
whichever of its sounds corresponds to the number
contained in the message.
When you press the HP 237R’s Tone button to change tones,
a Program Change message with the corresponding Program
Number is sent via the MIDI Out connector. Furthermore, a
Program Change message received via the MIDI In connector
changes the tone to the one with the corresponding Program
Number.
Each time the power is turned on, the instrument will always
be set to “On” (it will transmit/receive Program Change
messages).
If you set it to “Off,” the HP 237R will no longer send out
Program Change message when you change the tone being
used. Also, the HP 237R will then ignore any Program
Change messages when that are sent to it by an external unit,
and will not change the tone it is playing.
While holding down the [Piano 1] button,
[Piano 2] button, and [Harpsichord] button,
press the “E5” note to turn the setting On,
or the “F5” note to turn the setting Off.
fig.8-11.e
The tones and their corresponding Program Number appear
below:
Program Number Tone
01 Piano 1
02 Piano 2
03 —
04 Harpsichord
05 Vibraphone
06 Electric Piano 1
07 Electric Piano 2
08 Pipe Organ
09 Strings
10 Piano1 + Piano2
11 Piano1 + Harpsichord
12 Piano1 + Vibraphone
13 Piano1 + Electric Piano1
14 Piano1 + Electric Piano2
15 Piano1 + Pipe Organ
16 Piano1 + Strings
17 Piano2 + Harpsichord
18 Piano2 + Vibraphone
19 Piano2 + Electric Piano1
20 Piano2 + Electric Piano2
21 Piano2 + Pipe Organ
22 Piano2 + Strings
23 Harpsichord + Vibraphone
24 Harpsichord + Electric Piano1
25 Harpsichord + Electric Piano2
26 Harpsichord + Pipe Organ
27 Harpsichord + Strings
28 Vibraphone + Electric Piano1
29 Vibraphone + Electric Piano2
30 Vibraphone + Pipe Organ
31 Vibraphone + Strings
32 Electric Piano1 + Electric Piano2
33 Electric Piano1 + Pipe Organ
34 Electric Piano1 + Strings
35 Electric Piano2 + Pipe Organ
36 Electric Piano2 + Strings
37 Pipe Organ + Strings
38 Acoustic Bass / Piano1
39 Acoustic Bass / Piano2
40 Strings / Harpsichord
41 Acoustic Bass / Vibraphone
42 Acoustic Bass / Electric Piano1
43 Acoustic Bass / Electric Piano2
44 Pipe Organ / Harpsichord
45 Strings / Piano1
120168
Tempo Beat
2084060 8096
3602 4
Play Rec Demo SongSound On /Off
Metronome
StringsPiano 1 Piano 2 chord
Harpsi-
phone Organ
Vibra- Pipe
Piano 1
Electric
Piano 2
Electric
Tone
OffOn