Digitana SYNTHI VCS3 Poly MIDI-CV Manual - Halaman 4

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Triggering the VCS3 Envelope Shaper

The unit has Envelope Shaper (ES) trigger assignable to either a DK keyboard (if attached) or

any of the 4 midi gates (gate1-gate4) via a front panel rotary switch. How many of the 4

gates are available depends on the mode used (see above). E.g. in Poly2 mode, only 2 gates

are available (gate1 and gate2). In poly 4 mode (Quad Units only) or Controller mode all 4

gates are available to trigger the VCS3 ES.

Red and yellow panel LED's light when midi Gate 1 and/or Gate2 are triggered.

Gate 5 and gate 6 outputs are via jack sockets and offer Midi start/Stop and Midi clock

signals for interfacing and synchronizing with other external midi devices.

Using the front panel CV Scaling Potentiometers

CV1-CV3 can be scaled using the 3 front panel potentiometer knobs. These allow different

response to midi generated control voltages. Of particular importance is the fact that EMS

Synthi oscillators use 0.32V/Octave standard NOT 1V/Octave as on most other synths. For

pitch CV1 it is necessary to switch the toggle switch to the 0.32V/Oct setting and scale knob

set to maximum value 10. This will produce correct chromatic scales on Osc1 and Osc2. For

CV2 and CV3 you can either use 0.32V or 1V/Oct setting as you wish for different responses.

The 1V/Oct option is useful if a CV channel is being used as a modulation source rather than

give pitch control of a synthi Oscillator. Also if your VCS3 oscillators 1 and/or 2 are not

exactly scaled to 0.32V/Oct use the 1V setting and adjust the scaling pots until you get

proper chromatic pitches.

NEW FEATURE FOR 2010: precision multi-turn trimmers for fine tuning of

0.32V/Oct scaling of CV1-CV3.

On the rear of all Midi-CV units produced from Nov 2010 onwards, you will find 3 multi-turn

trimmers. These are adjusted by inserting a small flat head screwdriver. They are labelled :-

0.32V/Oct Adjustment

The purpose of these trimmers is that on many Synthi'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.