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Timber - Black
Timber - Black
Timber - Black


Bastl Instruments

Wave-folder VCA

Timber is very flexible wave shaping module that can produce rich timbres by adding harmonics to simple waveforms (triangles and sinewaves) or any other signal. It brings a novel take on the Serge-style wave-folding circuit & much more...

See the product page for instructions/downloadable content.

- More details in the Description below. -

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Timber contains 2 different unique wave-shaping circuits:
I. the WAVE DRIVER and II. the WAVE FOLDER, plus a voltage controlled crossfader to fade between the two different circuits or between one of them and the clean input signal.

Both circuits share the same control voltages: the SHAPE which sets the input amplification before the wave shaping circuit and the SYMMETRY control which adds voltage offset to the input signal to provide various asymmetric overdrives or wave folding sounds.

There is also voltage FBK CV jack which when provided with positive voltages feeds respective portion of the output signal back to the input which results in chaotic and aggressive behaviours. It is calibrated to work well with 5V gate voltages.


The WAVE DRIVER is an overdrive circuit with one folding stage and it has 2 configuration 3-way switches (9 different configurations). The drive switch can set the overdrive character to SOFT or HARD or something in between. The FOLD switch can set the folding threshold to HI or LO or it can turn the folding stage off in the NO position.


The WAVE FOLDER is a novel take on the serge style wavefolding circuit which has specific behaviour to abuse the high gain of the input amplification stage to provide rich high frequency timbres with higher settings of the SHAPE parameter. It has a configuration switch which can either activate clean 4 stage wavefolding in the OK position or highly asymmetric folding stage in the KO position that provides strange metallic character. The NO position provides only the very last overdrive-folding stage.


  • overdrive circuit with one folding stage (I. WAVE DRIVER)
  • 3-way DRIVE SWITCH to set character of overdrive (SOFT-MID-HARD)
  • 3-way FOLD SWITCH to configure the folding threshold level (LO-NO-HI)
  • independent output: I. OUT
  • 4 stage wavefolding circuit (II. WAVE FOLDER)
  • 3-way FOLD SWITCH to set character of folding stages (OK-NO-KO)
  • independent output: II. OUT
  • common INPUT for both circuits
  • SHAPE sets input amplification before signal enters waveshaping stages
  • SYMMETRY adds voltage offset to the input signal
  • SYMMETRY becomes bipolar attenuator when the jack is connected
  • X-FADE voltage controlled crossfader with bipolar attenuator
  • switch to select between INPUT and I. WAVE DRIVER for the left side of the X-FADE
  • X-FADE IN jack breaks normalisation of II. WAVE FOLDER on the right side of X-FADE
  • positive voltage at FBK CV jack sends signal from the output or II. back to the INPUT


  • 7 HP
  • PTC fuse and diode protected 10 pin power connector
  • 24mm deep
  • power consumption +12: < 50mA, -12: <50 mA


See the product page for instructions/downloadable content.


Data sheet


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