Digitana VCS3 MKII Quad Midi-CV User Manual - Page 5

Browse online or download pdf User Manual for Recording Equipment Digitana VCS3 MKII Quad Midi-CV. Digitana VCS3 MKII Quad Midi-CV 13 pages.

Print Page

The purpose of these trimmers is that on many VCS3's, Osc1 and Osc2 scaling is not precisely

0.32V/Oct (unless its just been serviced). This results in out of tune /non-chromatic pitch

scaling even if pitch cv at 0.32V/Oct is used to control Osc1/2 frequency. These trimmers

allow you to get around this problem.

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

precisely at 0.32V/Oct.

If you find that your VCS3 sounds out of tune when you patch eg CV1 to Osc1 and CV2 to

Osc2 freq control using matrix patch pins then do the following calibration. In 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 Quad 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 VCS3 Osc1 so it tracks chromatically

over several octaves.