Bastl Instruments Mini Modular Synth

Kastle is a battery-powered synthesizer that will fit in your pocket      10/10/16

Buying Choices

Bastl Instruments has introduced the Kastle, which they describe as a pocket size modular synthesizer that runs on batteries and produces unique modulations and lo-fi sounds. A spokesperson told us, "It is a lot of fun on its own but it also interfaces smoothly with other gear and greatly enhances modular system of any size. With its low price point it is perfect for anyone especially beginners."

The Synth version combines complex oscillator and LFO with stepped waveform generator.


  • mini patchbay with 16 different patch points
  • complex oscillator
  • 3 synthesis modes: phase distortion, phase modulation and track & hold modulation
  • pitch control with offset and CV input with attenuator
  • timbre control with offset and CV input with attenuator
  • waveshape control with offset and CV input
  • voltage controllable LFO with triangle and square outputs and reset input
  • stepped voltage generator with random, 8 step and 16 step loop mode
  • 2 I/O CV ports are available and can be routed to any patch point
  • the main output can drive headphones
  • 3x AA battery operation with power switch
  • open source
  • possibility of exchanging different LFO and OSC chips
  • comes with patch cables
  • the pattern on the sides varies and every unit is an original


Pricing and Availability:

Kastle Synth Assembled, street price $79 USD (excl. tax) , 79 EUR (incl. tax). Available for order - ships in less than a month.

Kastle Synth DIY KIT, street price 65 USD (excl. tax) , 65 EUR (incl. tax) will be available in November

More information:



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