Roland Sound Canvas SC-8850, Руководство пользователя

Страница: 48 / 256

48
Parts and Sounds
How the Number of Simultaneous Notes
and Voices Are Related
The sounds of the SC-8850 consist of units called
Voices.
There is a limit to how
many of these Voices can sound at once, and in the case of the SC-8850, up to 128 si-
multaneous voices can be used. Some sounds (Instruments) use 1 voice and others
use more (Instrument List, p.167). The main reason for using more than 2 voices is
to allow different timbres to be produced by different velocity values, or to produce
richer textures by layering the multiple sounds.
If more than 128 voices are used at once, later-sounded notes will be given priority,
and notes sounded previously will be turned off, starting from the oldest. If you use
only single-voice Instruments, you will be able to play 128 notes simultaneously, but
if some of the Instruments are more than 2-voice ones, you won’t be able to play 128
simultaneous notes. Even if a MIDI Note Off message (p.149) is received, voices will
be used for as long as the sound is heard. Be aware of this especially in the case of
sound with a long release (p.67).
If song data created with
128 voice playback in mind
is played back on a sound
generator with fewer
voices, some notes will
drop out, and the musical
result will not be as it
should. The SC-8850 has
128 voices, the SC-88Pro
and SC-88 has 64 voices,
the SC-55 has 24 voices,
and the SC-55mkII has 28
voices.