Doepfer A-105-4 Quad Poly SSI VCF praga run LFOs or random voltages

run LFOs or random voltages in to get complex modulation voltages out

and band pass outputs can be enabled at the beginning or end of the signal chain providing yet another dimension of spectral transformation

Power supply: USB or optional power supply

It delivers the classic character and playability of a vintage Roland modular synth—with all the advantages of a modern instrument

Doepfer A-105-4 Quad Poly SSI VCF praga run LFOs or random voltagesA 105 4 is our first polyphonic filter and contains four identical 24dB Lowpass filters (SSM2044 SSI2144 type). It has available common manual controls and CV inputs with attenuators for all parameters. Each filter has available a separate FM input as well as an Audio Input and Audio Output. The FM inputs are typically connected to the outputs of the associated envelope generator (e. g. A 141 4). The envelope amount for all four filters is controlled