Sound Source Mode 99; Transmitted Data; Received Data - Yamaha PSS-680 PortaSound Authorized Product Manual

Transmitted Data

All normal (manual) keyboard performance data is trans-
mitted, but no corresponding sound is produced by the
PortaSound ("local off"). This means that you can control
external MIDI sound sources from the PSS-680 keyboard
even while the PortaSound is "muted".
Channel settings are the same as for Keyboard Assign mode.
Bulk dumps can also be performed in this mode.
Pitch Bend Change Data
Under the assumption that the bend range of the receiving
equipment is set to +/–1 octave, the PortaSound sends pitch
bend change data according to its own range setting and
bender position.
Hand Percussion
Note data is sent on channel 16 whenever a drum pad is hit.
(See the tables on page 32.)

Received Data

During data reception in the Sound Source mode, all front
panel functions are inoperative except MIDI RECEIVE
CHannel, TRANSMIT CH, and MODE selection, MEL-
ODY VOLume, master volume, Transpose, and the effects
reverb and stereo chorus.
Note on/off and velocity data is accepted on all channels
specified with the RECEIVE CHANNEL FILTER. In other
words, you can play the PortaSound PSS-680 from an external
keyboard or sequencer as a velocity sensitive (dynamic vol-
ume) sound source.
MIDI note numbers from 24 to 108 are accepted in this mode,
meaning you can play the PortaSound over a full 7 octave
range not limited by the instruments keyboard.
The data received on channel 16 is treated as rhythm data
(see the tables on page 32). Program changes on channel
16 are ignored. Since Note On Velocity is accepted, you can
play the PortaSound's percussion instruments as a dynamic
drum tone generator.
Dynamic Allocation
The note on/off data received on channels 1 thru 15 is "dy-
namically allocated" to the respective sound sources (voices).
Program changes are accepted independently for each
channel, and the note on/off data received on these channels
always plays the corresponding voice. In other words, the
PSS-680 functions as a multi-timbral sound source, able to
play a number of individual timbres in up to 12-voice poly-
phony, each on different MIDI channels.

Sound Source Mode 99

Program Change Data
As in the keyboard assign mode, program change values from
00 to 99 select voices from 00 to 99, while values from 100
to 104 access the DIGITAL SYNTHESIZER voice banks
1 to 5. Values from 105 to 127 select voices from 00 to 22.
Points to Remember
•
The default value is voice number 00 for all channels.
Once this is changed through reception of program
change data on individual channels, the new voice
numbers are stored when Sound Source mode 99 is
exited or power to the PortaSound is turned off.
When power is turned off, then on again, or when
MIDI mode is switched to 99 after having been set to
00, the currently selected voice number becomes the
default voice number for all channels.
•
The PSS-680 of course remains 12-voice polyphonic
in this mode too. If the received data would necessitate
the playing of more than 12 notes simultaneously, the
oldest data is ignored and only the last 12 notes received
are played.
When this happens, the message
meaning "channel full", appears on the display.
•
In mode 99, Start, Stop and Timing Clock data are
ignored. Pitch bend change data is received on each
channel. Pitch bend range is automatically set to &
1 octave. Sustain on/off and modulation (vibrato)
on/off is also accepted. Remember, though, that each
voice has its own default setting for sustain and vibrato,
which is automatically chosen whenever that voice
selected via program change. This default setting may
of course be changed by transmitting the appropriate
control change data to the PortaSound.
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