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Chapter 1. Overview of the XP-30
Number of Simultaneous Voices
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.
Calculating the Number of Voices
Being Used
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)
How a Patch Uses Notes
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.
Note Priority in Performance Mode
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.
Voice Reserve
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.
* It is not possible to make Voice Reserve settings that would
cause the total of all Parts to be greater than 64 voices.
Basic Operation
Switching Modes
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
Sound Source
Selecting Patch mode, Performance mode, Rhythm Set mode,
and GM mode will determine sound source operation. One
mode always has to be selected.
Patch Mode
In this mode, you can play an individual Patch from the
keyboard or modify Patch settings. If youre using an
external MIDI device to control the XP-30 in this mode, it will
function as a single-patch sound source.
Performance Mode
This mode makes the XP-30 function as a multitimbral sound
source, and Performance settings can be modified. If youre
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 thats assigned to a Part,
hold down [PERFORM] and press [PATCH]. Both button
indicators will light.
Rhythm Set Mode
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 youre using an external MIDI
device to control the XP-30 in this mode, it will still function
as a multitimbral sound source.
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