Yamaha QY700 Owner's Manual - Page 46

Maximum polyphony • The tone generator block has a maximum polyphony of 32 notes, in element units. I.e., 32 notes can be played simultaneously if you are using normal voices that consist of one element or drum voices, and 16 notes can be played simultaneously 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. Note priority order 1 2 Part number 10 1 10 11 16 17 18 26 27 32 9 11 16 26 17 25 27 32 • 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 settings 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 generator 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. Tone generator number 1 2 MIDI channel 1(A01) 2(A02) 16 17 18 16(A16) 17(B01) 18(B02) 32 32(B16) BASIC CONCEPTS • When setting the Song mode Out Channel "TO TG" parameter, you must first check the MIDI channel of the tone 1 generator block. • Unless you have something special in mind such as layering 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. Sequencer block Sequence tracks Sequence tracks TR 1 musical data TR 2 musical data TR 16 musical data TR 17 musical data TR 32 musical data Pattern TR 1 TR 2 TR 3 M001 Phrase Phrase Phrase M002 TR 16 Phrase • • • TO TG Part 1 Part 16 Part 17 Part 32 Tone generator block MIDI OUT-A MIDI OUT-B MIDI OUT-A MIDI OUT-B Chapter 1 45