G-Storm Electro T2K-VCF Eurorack Transcendent 2000 Filter Adaptation

Introducing the T2K-VCF: an 8HP analog circuit adaptation of the lowpass/bandpass filter from an obscure 70s monosynth – the Powertran Transcendent 2000.

T2K-VCF is a 2-pole CA3080 OTA design w/ CA3140 op amp compensation at each stage. Translation = no loss of bass frequencies even at extreme resonance settings. Resonance will self-oscillate and produces a nice sine wave alone. T2K-VCF will fatten up routine oscillators - transform boring square/pulse and straight ramps into curvy vixens dressed to kill.  Wavefolded material sounds phenomenal on this.

FREQUENCY | the initial Cutoff Frequency of the filter

RESONANCE | the depth of the peak frequency resonant feedback

IN1 & IN2 | Mix together 2 different audio signals, each w/ their own mix pot.

KB | Modulate the Cutoff Frequency w/ a V/oct signal or any other polar/bi-polar mod. Self-oscillation resonance will track v/oct loosely, but you will need to tweak the Initial Cutoff Frequency (Tune) and the KB amount knob (width tracking) to get there.

CV | Another Frequency mod can go here, range is greater than the KB input.

SHAPE | Select between LP lowpass or BP bandpass filter output w/ this mode switch.

OUT | the audio output jack of the filter

Includes a 10-pin to 16-pin Eurorack ribbon connector

Specs
8HP Module width
24 mm Module depth
14 mA on +12V
25 mA on -12V
0ma on 5V (not used)

The T2K-VCF pairs well with:

Wavefolders or VCO/wavefolders – Cre8Audio Capt’n Big-O, Dannysound Timbre

GSE 2xADSR – use envelope CV for some deep bass modulation

GSE Polychrome Phaser

Delay Effects – Happy Nerding FX Aid