Doepfer A-127 VC Resonance Filter

The Doepfer A-127 VC Resonance Filter Module is a Voltage-Controlled Triple Resonance Filter), consisting of three separate band pass filters with one common input. For each of the filters, the filter frequency and Resonance can be manually controlled, and in addition the filter frequency can be voltage controlled. Each filter has its own audio output. There is also a Mix output which takes your chosen amounts of each of the three filter outputs and the original signal - set by the Audio Level controls - and outputs them from one socket. Each of the filters also has an internal LFO (a triangle waveform) for modulating the filter, and there are controls for LFO frequency and amplitude. Instead of the LFO, an external control voltage can be used, whose amplitude can be manually controlled.

There is an alternative scenario:- each of the three filters can also be configured as a 12dB low-pass filter with resonance control. To do this, a jumper has to be repositioned on each of the three circuit boards.

The main features of the Doepfer A-127 VC Resonance Filter Module include:

• Voltage controlled triple resonance filter
• Resonance can be manually controlled
• Each filter has dedicated audio output
• Internal LFO (Triangle Waveform)
• Controls for LFO Frequency and Amplitude
• Silver Chassis