Maximum Polyphony - Yamaha A4000 Owner's Manual

1. System Overview
About the Program Mode
In the program mode the A5000/A4000 tone generator can be set to function in the Single or Multi
mode. When the Single mode is selected only one program can be played at a time.
• Even when the Single mode is selected it is possible to achieve Multi-mode type performance by
assigning multiple samples or sample banks to the same key range, and assigning each a differ-
ent MIDI receive channel via the Receive Channel Assign parameter (page 93).
In the example below, sample A will be played via MIDI channel 1, and sample B will be played via
MIDI channel 2.
Program
Sample A
Receive Channel Assign = 1ch
When the Multi mode is selected, different programs can be assigned to as many as 32 "parts" on the
A5000 (part A01 — B16) or 16 parts on the A4000 (part 01 — 16), and each part played via a different
MIDI channel.
In the example below, MIDI data received on MIDI channel 1 via the MIDI IN-A connector controls
program 001, data received on MIDI channel 2 controls program 002, and data received on MIDI
channel 3 controls program 003. In this case the Receive Channel Assign settings for samples A and B
assigned to program 001 are ignored.
• When the Multi mode is selected, the program assigned to the part for which the Basic Receive
Channel (page 89) is selected becomes the "master program." All PLAY mode effect, setup, and
control parameters set for the master program will affect all parts in the same way.
In the example below, if the Basic Receive Channel is A02 (02 in the A4000), program 002
becomes the master program.
Part
A01(01)
A02(02)
A03(03)
:
A16(16)
The A4000 part numbers are shown in parentheses

Maximum Polyphony

The maximum polyphony of the A5000 is 126 notes, and that of the A4000 is 64 notes. This is the "per
sample" polyphony, thus when stereo samples (each actually using two samples) are played, or when
multiple samples are layered, the total polyphony is reduced accordingly.
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Chapter 3 The A5000/A4000 System & Features
Sample B
Receive Channel Assign = 2ch
Program
Program 001
Program001
Program002
Program003
:
Program032
• A5000/A4000
Sample A Sample B
Receive Channel
Assign = A02 (02)
Ignored
Receive Channel
Assign = A03 (03)