The TB Filter Envelope module is inspired by the filter, envelope and accent circuits of the Roland TB 303.
It copies the same 3 and a bit pole low pass filter and most importantly the resonance feedback loop.
Like the original it has pots to control the Cutoff Frequency, Resonance and Envelope Modulation. These are true to the original in their operation.
The envelope is controlled by a CV gate input that triggers the envelope and the filter modulation. If no gate is supplied the filter will open and close as you would expect but without any modulation. You can therefore connect to an external envelope and VCA but part of the character of the 303 is down to the way the cutoff and resonance behave when the internal envelope is triggered.
The sound is transformed when you apply a gate. The internal envelope then modulates the filter and tweaks the cutoff during the envelope cycle. With the envelope modulation pot control you can then create those classic 303 like tones, from chirpy squeals, to, for want of a better word, wumps… you know what I mean!
Ouput the filter to a VCA modulated by an external envelope with no attack, low decay, even lower sustain and almost no release and you will really get that 303 sound.
The 303 uses the same envelope to control its internal VCA, with the above setup you can have different envelopes and create a whole new set of acid-like textures.
- 10hp
- Manual Cutoff, Drive, Resonance, Chirp, Envelope Mod & Accent Controls
- CV Inputs: Gate, Accent and Cutoff
- Audio Inputs: Signal In
- Audio Outputs: Filter Out
Video: https://youtu.be/F69m68ZeZQo
Product Specs
- Item Number: 25008
- Make: Ge0synchronous Synth
- Model: TB-EF
- Condition: Brand New
- Finish: Black
- Categories: keyboards-and-synths ⇒ eurorack
- Function: Envelope Generator Filter
- Made In: New Zealand
- MPN: GE0-TB-EF
- Modular Grid: Eurorack ⓘ ＋
- Dimensions*: 10 HP 34 mm deep
- Power*: ? mA +12V ? mA -12V 0 mA 5V
* User contributed details