The Eurorack module AJH MiniMod Dual LFO & VCA has two LFOs and one VCA. The LFOs change the waveform from sawtooth to triangle and ramp (ramp-shaped waveforms), depending on the position of the shape control. Furthermore, the pulse width on the output of the square wave is variable. LFO 1 can switch to a low frequency range and has a sync input. The nominal maximum frequency is 20Hz with the triangle wave set, but under certain conditions it can also be higher and rise to the audio range.
AJH Dual LFO - and a VCA!
In addition, the module includes a DC coupled VCA whose input is normalized with the output of LFO 2, so that a 0 to +5V input signal at the VCA CV input allows control of the LFO amplitude. MiniMod Dual LFO & VCA is therefore particularly suitable for controllers such as the Waldorf KB37, whose modwheel outputs 0 to +5V voltages that can be routed into the VCA CV. VCO vibrato or filter "Wah" effects can thus be achieved very easily via controllers.