Velocity Randomization Bandwidth; Pitch Bend Response Timing; Sysex Retransmission - H-Pi Instruments Tonal Plexus TPX 2s User Manual

INSTRUMENTS www.h-pi.com · T O N A L P L E X U S T P X 2s/4s/6 · User Manual
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and turn the unit back ON.
DIP 3: Pitch Bend Response Timing
Synthesizers from various manufacturers respond differently to Pitch Bend messages in terms of
timing. In order to produce pitches always sounding properly tuned, such that the Pitch Bend is not
audible after a note has begun sounding, TPX2s/4s/6 sends MIDI Pitch Bend messages before MIDI
Note messages with a default timing gap of less than 5 milliseconds between the two messages. This
gap is well below the average perceptual threshold (some sources place this threshold as high as 35
ms). In some cases, a synthesizer or sequencer might quantize the timings of incoming MIDI data
such that the default gap is not enough, and a pitch may bend audibly after it is sounding, even
though the Pitch Bend message was sent in advance of the Note message. In this case, the Pitch
Bend Response Timing DIP switch should be adjusted. Switch 3 is used for this purpose. Timing may
be adjusted from the default of less than 5 ms to 15 ms, as shown below.
To change the pitch bend response timing, turn the unit OFF, change the position of DIP
switch 3, and turn the unit back ON.
DIP 4: Sysex Retransmission
By default, TPX2s/4s/6 ignores all sysex messages which are not table programming messages;
however, you may want TPX2s/4s/6 to retransmit other sysex messages which it receives. Switch 4 is
used for this purpose. A 120 ms recovery timing gap is controlled by DIP switch 9, for compatibility
with older equipment. To change the sysex retransmission function, turn the unit OFF, change the
position of DIP switch 4, and turn the unit back ON. NOTE: Switching DIP 4 ON may cause tuning
errors! Always turn 4 OFF before sending tuning tables.
1
4
Default: Sysex Retransmit OFF
4 OFF : Sysex is not retransmitted
1
3
Default: 0 ms
3 OFF : 0 ms
ON
2
ON
2
3
Option: ~ 10 ms
3 ON : ~10 ms
2
4
Option: Sysex Retransmit ON
4 ON : Sysex is retransmitted
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