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MIDI Data Format
NOTE:
1 By default (factory settings) the instrument ordinarily functions
as a 16-channel multi-timbral tone generator, and incoming
data does not affect the panel voices or panel settings. How-
ever, the MIDI messages listed below do affect the panel
voices, auto accompaniment, and songs.
• MIDI Master Tuning
• System exclusive messages for changing the Reverb Type,
Chorus Type and DSP Type.
2 Messages for these control change numbers cannot be trans-
mitted from the instrument itself. However, they may be trans-
mitted when playing the accompaniment, song or using the
Harmony effect.
3 Exclusive
<GM System ON> F0H, 7EH, 7FH, 09H, 01H, F7H
• This message automatically restores all default settings for
the instrument, with the exception of MIDI Master Tuning.
<MIDI Master Volume> F0H, 7FH, 7FH, 04H, 01H, ll, mm, F7H
• This message allows the volume of all channels to be
changed simultaneously (Universal System Exclusive).
• The values of "mm" is used for MIDI Master Volume. (Values
for "ll" are ignored.)
<XG Master Tuning> F0H, 43H, 1nH, 4CH, 00H, 00H, 00H,
ddH, ddH, ddH, ddH, F7H
• This message simultaneously changes the tuning value of
all channels.
• The values of "dd" are used for XG Master Tuning.
• The default value of "dd" are 00H, 04H, 00H, 00H, respec-
tively.
146
DGX-630/YPG-635 Owner's Manual
<Reverb Type> F0H, 43H, 1nH, 4CH, 02H, 01H, 00H, mmH,
llH, F7H
• mm : Reverb Type MSB
• ll : Reverb Type LSB
Refer to the Effect Type List (page 138) for details.
<Chorus Type> F0H, 43H, 1nH, 4CH, 02H, 01H, 20H, mmH,
llH, F7H
• mm : Chorus Type MSB
• ll : Chorus Type LSB
Refer to the Effect Type List (page 138) for details.
<DSP Type> F0H, 43H, 1nH, 4CH, 02H, 01H, 40H, mmH, llH,
F7H
• mm: DSP Type MSB
• ll: DSP Type LSB
Refer to the Effect Type List (page 138) for details.
4 When the accompaniment is started, an FAH message is trans-
mitted. When accompaniment is stopped, an FCH message is
transmitted. When the clock is set to External, both FAH
(accompaniment start) and FCH (accompaniment stop) are rec-
ognized.
5 Local ON/OFF
<Local ON> Bn, 7A, 7F
<Local OFF> Bn, 7A, 00
Value for "n" is ignored.
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Do you have a question about the Portable Grand DGX-630 and is the answer not in the manual?
Questions and answers
My left speaker has developed a rattle. Very annoying. How can I fix it?
To fix a rattling left speaker on a Yamaha Portable Grand DGX-630, follow these steps:
1. Check Assembly – Ensure all screws and components of the keyboard are securely tightened, as loose parts can cause rattling.
2. Inspect the Speaker Area – Look for any foreign objects or debris around the left speaker that might be causing the noise.
3. Adjust Volume and Settings – Lower the volume and test different voices to see if the issue persists at all sound levels.
4. Test with Headphones – Plug in headphones to check if the distortion occurs only through the speaker or also in the headphone output.
5. Power Cycle – Turn off the keyboard, unplug the AC adapter, wait a few minutes, and then restart it.
6. Use the Recommended Power Adapter – Ensure you are using the specified PA-5D or an equivalent Yamaha-recommended adapter to avoid power-related issues.
7. Seek Professional Repair – If the problem continues, the speaker may be damaged and require servicing by a Yamaha technician.
If none of these steps resolve the issue, professional servicing is recommended.
This answer is automatically generated
@Meg I have the same keyboard (dgx-630 ypg-635) I bought 15 years ago and it have a rattle on the same speeker, on low-notes and hige volum.