The VDR-1 is a self-oscillating VCF drum synthesizer. It features an oscillator that produces thick sounds from high to low frequencies.The waveform can be switched between triangle and sawtooth. Sound can be generated either by striking the unit itself or by using an external trigger such as a sequencer or keyboard. The SWEEP modulation is designed to be quite strong, so please adjust it together with the COARSE control. The SWEEP modulation previously affected both the VCF and VCO, but in this version it affects the VCO only. TRIGGER IN uses a 3.5 mm jack. Even when a plug is inserted into TRIGGER IN, the internal trigger is not disabled.This allows the unit to be struck while using an external trigger. The FINE control range has been adjusted to allow more precise tuning. There is no power switch.When using a battery, the power turns off when the plug is removed from the OUT jack. Power: -9V DC
