Yamaha CLP-990 Manual Do Utilizador

With MIDI, voices are assigned to specific numbers, 
called “program numbers.” The numbering standard 
(order of voice allocation) is referred to as the “voice 
allocation format.”
• Voices may not play back as expected unless the 

voice allocation format of the song data matches 
that of the compatible MIDI device used for play-
back.

[Main Voice Allocation Formats]

■

This is one of the most common voice allocation 
formats.
• Many MIDI devices are compatible with GM Sys-

tem Level 1, as is most commercially available 
software.

• The CLP-990 is compatible with GM System 

Level 1.

■

XG is a major enhancement of the GM System Level 
1 format, and was developed by Yamaha specifically 
to provide more voices and variations, as well as 
greater expressive control over voices and effects, 
and to ensure compatibility of data well into the 
future.
• The CLP-990 is compatible with XG.
• Performance data recorded with preset voices on 

the CLP-990 can be played on other XG-compati-
ble instruments.

■

This voice allocation format is compatible with 
many of Yamaha’s MIDI devices, including the 
Clavinova series instruments.
This is also common format used with various 
Yamaha software.
The CLP-990 is compatible with DOC.
• Even if the devices and data used satisfy all the 

conditions above, the data may still not be com-
pletely compatible, depending on the specifica-
tions of the devices and particular data recording 
methods.