Ajh-synth MiniMod VCO User Manual download pdf (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

1 2 3 4

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Ajh-synth MiniMod VCO User Manual Page 2

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