Digitana SYNTHI VCS3 Poly MIDI-CV Manual - Página 5
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By default the trimmers are adjusted so that when CV1-CV3 pots are set at 10 on the front of
the unit AND the 3 toggle switches are set to 0.32V/Oct, then pitch CV1-CV3 are scaled at
0.32V/Oct.
If you find that your VCS3 sounds out of tune when you patch e.g. CV1 to Osc1 and CV2 to
Osc2 freq. control using matrix patch pins, then do the following one-time calibration
procedure.
(What follows assumes the play mode of the unit is Poly2 .)
Osc1/CV1
Make sure the VCS3 is warmed up first (at least 15mins)
Set Input ch1 pot on the VCS3 to max 10 and Osc1 frequency to some suitable value. Set up
the following patch:
Set the CV1 scale pot to 10 on the Poly Midi-CV Unit and the toggle switch to 0.32V/Oct
range.
Set the lower toggle switch to the CV1 setting and the gate setting to G1. Plug in a Midi
Keyboard or software sequencer play a sequence of keys/notes at different octaves. If notes
sound flat/sharp...make small adjustments to the first of the rear trimmers with a small
screwdriver. You should hear the pitches of the notes played change. Doing this you can trim
the 0.32V/Oct setting of CV1 to match the scaling of your VCS3 Osc1 so it tracks
chromatically over several octaves.
Osc2/CV2
Apply the same procedure as above to CV2 and Osc2. The patch will now be as above but the
black pin connects Osc2 out to Output ch1 and the red precision pin connects Input Ch2 to
Osc2 frequency control.
Make sure Input ch2 level pot is set at 10 on the Synthi.