Program Change; System Messages; System Exclusive Messages; System Realtime Messages - Yamaha S90 Owner's Manual

Program Change

Messages which determine which voice to select for each
Part. With a combination of Bank Select, you can select
not only basic voice numbers, but also variation voice
bank numbers.
Pitch Bend
Pitch Bend messages are continuous controller messages
that allow the pitch of designated notes to be raised or
lowered by a specified amount over a specified duration.
Channel Aftertouch
Messages which let you control the sounds by the
pressure you apply to the keys after the initial striking of
the keys, over the entire channel.
The S90 does not transmit this data from the keyboard;
however, the S90 does properly respond to this data when
received from an external device.
Polyphonic Aftertouch
Messages which let you control the sounds by the
pressure you apply to the keys after the initial striking of
the keys, for each individual key.
The S90 does not transmit this data from the keyboard;
however, the data is transmitted from the S90's internal
sequencer.
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About MIDI

SYSTEM MESSAGES

System messages are the data related to the overall
system of the device.

System Exclusive Messages

System Exclusive messages control various functions of
the S90, including master volume and master tuning,
tone generator mode, effect type and various other
parameters.
General MIDI (GM) System On
(Sequence Play mode only)
When "General MIDI system on" is received, the S90 will
receive the MIDI messages which are compatible with
GM System Level 1, and consequently will not receive
NRPN and Bank Select messages.
F0 7E 7F 09 01 F7 (Hexadecimal)
n Make sure that the interval between this message and
the first note data of the song is at least a quarter note
or greater in length.
Master Volume
When received, the Volume MSB will be effective for the
System Parameter.
F0 7F 7F 04 01 ll mm F7 (Hexadecimal)
* mm (MSB) = appropriate volume value,
ll (LSB) = ignored

System Realtime Messages

System Realtime messages
Control the sequencer, including Start (FAH), Continue
(FBH), Stop (FCH), MIDI clock (F8H) and Active
Sensing messages (see below).
Active Sensing
Once FEH (Active Sensing) has been received, if no MIDI
data is subsequently received for longer than an interval
of approximately 300msec, the S90 will perform the same
function as when All Sounds Off, All Notes Off, and
Reset All Controllers messages are received, and will then
return to a status in which FEH is not monitored
System Common Messages (Transmit only)
System Common messages also control the sequencer,
including Song Select and Song Position Pointer
messages.
n Refer to the MIDI Data Format in the "Data List" book
for more information on the various messages.