AMSynth's Introduces the AM1013 Octave Fixed Filter Bank - Band Pass Perfection

video upload by AMSynths

"AMSynth launch the next 'lost module' of the ARP 2500. Eight 12dB fixed band pass filters in parallel, each with a nice gentle resonance. Individual outputs, mix outputs and a bypass feature. Perfect for post processing sounds, More resonance can be dialed in with VCA module feedback loop that uses the dual inputs and outputs."

"This 14HP module is a re-imagining of the ARP 1013 octave filter bank that was announced in 1970 by Tonus as part of the 2500 Synthesizer, but it never made it into production. It consists of eight band pass filters with their cutoff frequency spaced one octave apart, from 63Hz to 8kHz.

The filter is very useful for creating formant and vowel sounds. The individual outputs enable voltage control of the filter by using eight external VCA's - for example the 1032 Mixer & Distributor module.

The AM1013 is based on contemporary Op Amp based filter bank designs, such as the EMS Eight Octave Bank from April 1971. It uses a 12dB high pass filter in series with a 12dB low pass filter to create eight band pass filters that are connected in parallel and set one octave apart. The filters have a fixed frequency and Q of 5.0.

The eight filter outputs are mixed into a single output with two jack socket. Each filter can be adjusted for level using the ARP 2500 style control knobs. The input and output levels can also be adjusted using the front panel potentiometers.

High quality WIMA polypropylene capacitors have been used to ensure a beautiful sounding filter. The filter has a bypass feature which can be set using the push button switch (with green LED). The wide frequency range from 16Hz to 8KHz, Q of 5.0, individual outputs and high quality sound make for a unique module that takes its heritage from 1971.

The 1013 pairs nicely with the 1032 Mix & Distributor module, where each band pass filter output is patched into a VCA, enabling time domain mixing of the fixed filter sounds."