6
Set the CV1 scale pot to 10 on the Poly Midi-CV Unit and the to le switch to 0.32V/Oct ran e.
Set the lower to le switch to the CV1 settin and the ate settin to G1. Plu 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 labelled CV1 with a small
screwdriver. You should hear the pitches of the notes played chan e. Doin this you can trim the
0.32V/Oct settin of CV1 to match the scalin of Synthi 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 A.
Set the CV2 scale pot to 10 on the Poly Midi-CV Unit and the to le switch to 0.32V/Oct ran e.
Set the lower to le switch to the CV2 settin and the ate settin to G2. Plu in a Midi Keyboard
or software sequencer play a sequence of keys/notes at different octaves. This time to tri er G2
and midi note 2 pitch CV (which is CV2) you need to hit 2 keys at the same time.
In poly2 mode ..the unit is duophonic so that when 2 keys are struck at once it assi ns lower note
to CV1/Gate1 and upper note to CV2/Gate 2. We want to trim the CV2 0.32V/Oct so you need to
hit 2 keys (e. . 2 keys next to each other on the midi keyboard is easiest) to tri er ate G2 and
CV2. If you hit just one key you will only tri er G1 and only Cv1 will chan e as you play different
sin le notes.
Now whilst playin these two keys transpose the midi keyboard up an octave or down and octave.
If the notes heard throu h the Synthi A sound flat/sharp...make small adjustments to the second
of the rear trimmers with a small screwdriver. You should hear the pitches of the notes played
chan e. Doin this you can trim the 0.32V/Oct settin of CV2 to match the scalin of Synthi A Osc2
so it tracks chromatically over several octaves.
The fine tunin of CV3 scalin is less critical unless you intend on usin CV3 to act as pitch CV for
controllin Osc3 in the audio ran e. You will need to put the unit in Poly4 play mode if you want to
use this option because In this mode CV1-CV4 (CV4 only available on Quad Midi units)
correspond to pitches of Midi notes 1-4. For chan in play modes on the unit see later on in this
uide. Note Osc3 of the Synthi is not (by desi n) trackin at 0.32V/Oct but at 0.26V/Oct (!) so you
will need to adjust the third trimmer on the rear of the unit rather more than for CV1 and CV2 to
et the scalin down to 0.26V/Oct. Other than this the procedure is as above but the patch should
now take Osc3 to Output Ch1 and CV3 to Osc3 freq. control. which is achieved by insertin the
special pin cable anywhere in the Osc3 freq ‘column’ of the matrix.
Switch the ate selection control to G3 and then hit 3 simultaneous keys on your midi keyboard.
This will enerate CV1-CV3 pitch CV’s and tri er G1-G3 (only G1 and G2 have Led’s that li ht ).
Apply transpose to the 3 keys you are simultaneously hittin to test chromatic scalin of Osc3 and
adjust the third trimmer as necessary.
