MIDI input
Midi note control
Synthesizers with a YM62100 key assigner chip feature several instruments, such as
Organ, Poly-Synth, Strings, Mono-Synth, …
Some of these instruments are connected in “synth-groups” in a fixed manner, others can
be played independently in split keyboard modes, or with multiple keyboards. An example
for a fixed grouping is the Poly-Synth and String sections. These are always connected
and will play the same notes.
TM62100 allows independent control of the several synths groups via midi. Each group
has its own midi channel configurable using the built in config menu. Groups 1 and 2 -
corresponding to the lower and upper keyboards - have a range of 61 notes and are 7-
voice polyphonic (or paraphonic, depending on the instrument). Group 3, the “pedal” group
is monophonic with a range of 3 octaves, an extended range of 4 octaves is available for
the BASS sound.
Here is how the instruments are connected to the various groups in several synthesizers:
•
SK15
: All sounds on Group 2
•
SK20
: No split mode: Group 1 plays organ, poly-synth and strings. In split mode:
Group 1 plays Organ (all 61 notes), Group 2 plays String and Polysynth (All 61
notes)
•
SK30
: Same as SK20, but SOLO-Synth plays on channel 2 in NORMAL mode and
channel 3 in BASS mode.
•
SK50D
: Group 1 plays the lower keyboard, Group 2 plays the upper keyboard.
BASS Plays on Group 3. Depending on settings, SOLO SYNTH plays on Group 2
(NORMAL) or Group 3 (BASS)
The midi note range of group 1 and 2 is C1 (note 24) – C6 (note 84). The range group 3 is
C#1 (note 25) – C5 (note 72). The range C#1 – B1 is an extension to the original range
and only available for the BASS sound.
1
In case of the SK15, it might be possible to re-route the organ section to Group 1 by modifying the circuit.
This has not been tested yet.
