Kastle Arp, a ‘Modular Synth For Everyone’, Now Available

Bastl Instruments today announced that its new Kastle Arp synthesizer, described as a ‘modular synth for everyone’, is now available.

The Kastle ARP is a modular melody generator, based on a quantized sine wave oscillator with a digital waveshaper.

Kastle Arp Overview:


  • Quantized-pitch sine wave oscillator
  • NOTE knob to browse thru 8 octaves
  • Timbre xor waveshaper
  • CHORD CV input switches between 3 chords
  • CV controllable decay envelope generator
  • Triggered pitch with “negative” decay to achieve melodic variation
  • BASS output with the root of the chord
  • Boot mode to set a root note and fine-tune
  • Voltage-controllable clock with square and triangle output
  • Stepped voltage generator with random, 8-step, and 16-step loop modes
  • Two I/O CV ports routable to any patch point
  • Main OUT capable of driving headphones
  • 3x AA battery operation or USB power, selectable by a switch
  • Open source
  • Durable black & silver PCB enclosure

Kastle Arp is available now for €127.33.


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