Yamaha QY700 Maximum polyphony, Connections between the sequencer block and the tone generator block

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BASIC CONCEPTS
Chapter 1
1
Maximum polyphony
• The tone generator block has a maximum polyphony of 32
notes, in element units. I.e., 32 notes can be played simulta-
neously if you are using normal voices that consist of one
element or drum voices, and 16 notes can be played simul-
taneously with normal voices that consist of two elements.
• The number of elements used by each voice is given in the
voice lists of the separate “QY700 Reference Listings”.
• If MIDI messages are received which request more than the
available maximum polyphony, currently-sounding notes
will be turned off, and the later arrivals will be played. This
type of note assignment is called “last-note priority.”
• The note priority of each part of the tone generator is fixed
as follows, and when the maximum polyphony is exceeded,
notes will be turned off starting with the lower-priority parts.
You should use high-priority parts for musically important
parts such as the melody or bass, so that these important
lines will not be interrupted even if the maximum polyphony
is exceeded.
• It is possible to use MIDI System Exclusive messages to
specify Element Reserve settings for each part. If you specify
an Element Reserve setting, the specified number of notes
will be reserved for that part, so that no further notes will be
“stolen” from that part when the maximum polyphony is
exceeded. It is a good idea to make Element Reserve set-
tings for musically important parts such as the melody or
bass, whose notes must not be interrupted.
Connections between the sequencer block and
the tone generator block
• The sequencer block is internally connected to the tone gen-
erator block via MIDI.
• The connections between each track of the sequencer block
and each part of the tone generator block can be specified
by the Song mode Out Channel ( → p.103) setting “TO
TG.”
• The MIDI channels of the 32 parts of the tone generator
block can be set to any desired setting via MIDI System
Exclusive messages. With the default settings, these are set
to the same MIDI channel number as the part number, as
shown in the following table.
• When setting the Song mode Out Channel “TO TG” pa-
rameter, you must first check the MIDI channel of the tone
generator block.
• Unless you have something special in mind such as layer-
ing multiple parts, it is best to use the System Exclusive XG
System On message to restore the MIDI channel of each
tone generator part to the default value before making “TO
TG” settings.
TR 1 musical data
TR 2 musical data
TR 16 musical data
TR 17 musical data
TR 32 musical data
Sequence tracks
Sequencer block
Sequence tracks
TR 1 Phrase
TR 2 Phrase
TR 3 Phrase
TR 16 Phrase
M001 M002 • • •
Part 1
Part 16
Part 17
Part 32
MIDI
OUT-A MIDI OUT-B
MIDI OUT-A MIDI OUT-B
TO TG
Pattern
Tone generator
block
Note priority order 1 2 10 11 16 17 18 26 27 32
Part number 10 1 9 11 16 26 17 25 27 32
Tone generator number 1 2 16 17 18 32
MIDI channel 1(A01) 2(A02) 16(A16)17(B01) 18(B02) 32(B16)