A-135-5 Polyphonic Mixer
The Polyphonic Mixer and Suboctave Generator has three channels A, B and C with 4 inputs each. Each of the three channels has its own level parameter, an input for control voltages, as well as an attenuator for the CVs and a mute switch.
The total of 12 VCAs accept audio, but also CV and allow a variety of applications. Four voices with three signals, complex polyphonic modulations, or even exciting feedback patching is possible here.
Doepfer have implemented a very useful feature: a suboctave generator. If audio goes into channel A, but channel B remains empty, suboctaves to the signals on channel A are generated here. Very useful if you don't have 12 but "only" 8 or 4 oscillators available. The waves generated here are plus waves at half the frequency of the waves on A. The pulse width is 50%.
The sum output provides all 12 signals, which could be used for paraphonic situations, for example. So you can send all VCA outputs into one filter or waveshaper. The 135-5 is a solid and versatile module that may also find a place in non-polyphonic systems.
Please note: The module should be used only with DC coupled VCO outputs (e.g. A-111-4, A-111-3). With AC coupled VCO outputs (e.g. A-110-1, A-110-2) a DC offset will occur at the outputs when the suboctave option is installed.
Features:
- Mixer with 12 VCAs distributed in 3 groups
- Level potentiometer, CV input and mute switch per channel
- Suboctave generator on channel B
- Sum output
