AJH Synth MiniMod VCO - Manual (Page 2)

1 Octave Switch
5 Exp. CV Level
9 Sync Threshold
4 Exp. CV Input
10 Sync Type
8 Sync Input
3 1 V / Oct. Input
Linear CV Level 7
6 Linear Input
PWM Control 16
PWM Shape 15
Shark Output 13
Saw Output 11
Square Output 14
Triangle Output 12
Tune Control 2
1 Octave Switch : Use the Octave switch to quickly select preset octaves, the Lo setting reduces the oscilla-
tor frequency into the Low Frequency Oscillator range so that it can be used as a modula-
tion source.
2 Tune Control : The tune control varies the oscillator pitch by around +/- 8 notes. Larger variations in
pitch can be obtained by applying a positive or negative control voltage to the 1 Volt per
Octave input (3)
3 1 V/Oct. Input : This is the 1 Volt per Octave control voltage input. Applying a positive voltage to this
input raises oscillator pitch at the rate of exactly one octave for each volt applied, and a
negative voltage will reduce the pitch by exactly one octave per volt. The acceptable
input range is +/- 7 Volts. A limitation of the vintage oscillator core design means that
tracking may not follow the 1V/Oct law above 10KHz
Distribution Buss 1V/Octave CV signal:
The Eurorack power distribution buss can transmit a 1V/Octave voltage from a Mini/CV
converter or similar source. The MiniMod VCO accepts this signal by default as it is “normalled”
through the 1V/Oct socket, however plugging a jack into the 1V/Oct socket unswitches /
defeats this control voltage and allows the VCO to run free.
4 Exp CV Input : This is the Exponential Control Voltage input. Acceptable input voltage range is +/- 5V.
When a voltage is applied to this input it varies the oscillator pitch in a similar fashion to
the 1 V/Oct input, however the amount of control voltage applied to the oscillator core
can be regulated using the Exponential CV Level control (5).
5 Exp. CV Level : This control adjusts the amount of voltage from the Exp. CV input that is passed to the
oscillator core, its range is 0 to 120%.
Controls, Inputs and Outputs