Roland XP-30 사용자 설명서

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The XP-30 is able to produce up to 64 voices simultaneously. 
The following paragraphs discuss what this means, and what 
will happen when more than 64 simultaneous voices are 
requested from the XP-30.

The XP-30 is able to produce up to 64 simultaneous voices. 
However this number is not simply the number of notes 
being played, but depends on the number of Tones used in 
each Patch. If you are playing one Patch which uses 4 Tones, 
you will be able to play 16 simultaneous notes. If you are 
using the XP-30 in Performance mode to play an ensemble, 
count the total number of Tones used by all the Parts using 
the following formula.

(currently sounding notes) x (number of Tones used in the 
Patch being played)

When the XP-30 is requested to play more than 64 voices 
simultaneously, a currently-sounding note will be turned off 
to make room for the newly requested note. The note with 
the lowest priority will be turned off first. The order of 
priority is determined by the Voice Priority setting.
Voice Priority can be set either to Last or Loudest. When Last 
is selected, a newly requested note that exceeds the 64 voice 
limit will cause the first-played of the currently sounding 
notes to be turned off. When Loudest is selected, the quietest 
of the currently sounding notes will be turned off.
Normally you will set Voice Priority to Last.

Since Performance mode is usually used to play an ensemble 
consisting of several Patches, it is important to decide which Parts 
take priority. Priority is specified by the Voice Reserve settings. 
When a note within a Patch needs to be turned off to make room 
for a new note, the Voice Priority setting of the Patch will apply.

The XP-30 has a Voice Reserve function that lets you reserve 
a minimum number of notes that will always be available for 
each Part. For example if Voice Reserve is set to 10 for Part 
16, Part 16 will always have 10 notes of sound-producing 
capacity available to it even if a total of more than 64 notes 
(total for all Parts) are being requested. When you make 
Voice Reserve settings, you need to take into account the 
number of notes you want to play on each Part as well as the 
number of Tones used by the selected Patch.

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The XP-30 contains a large number of functions. In order to 
organize these functions for easy access, they are grouped 
into the following modes. The mode that is selected will 
affect the way in which the sound source operates, how data 
is shown in the display, and how the function buttons work.
Use the Mode buttons to select the mode. The indicator of the 
selected button will light/blink, and the display will change 
according to the selected mode.

fig.1-06

Selecting Patch mode, Performance mode, Rhythm Set mode, 
and GM mode will determine sound source operation. One 
mode always has to be selected.

In this mode, you can play an individual Patch from the 
keyboard or modify Patch settings. If you’re using an 
external MIDI device to control the XP-30 in this mode, it will 
function as a single-patch sound source.

This mode makes the XP-30 function as a multitimbral sound 
source, and Performance settings can be modified. If you’re 
using an external MIDI device to control the XP-30 in this 
mode, it will function as a multitimbral sound source. 
To modify the settings of a Patch that’s assigned to a Part, 
hold down [PERFORM] and press [PATCH]. Both button 
indicators will light.

This is how you can play a Rhythm Set from the keyboard 
and modify the Rhythm Set settings. In this mode, the 
keyboard will play the Rhythm Set, but the XP-30 continues 
to function as a multitimbral sound source. So your effects 
settings of the currently selected Performance will be heard 
as you play the Rhythm Set. Rhythm Sets are assigned to Part 
10 of the Performance. If you’re using an external MIDI 
device to control the XP-30 in this mode, it will still function 
as a multitimbral sound source.