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Bastl Instruments & Casper Electronics release desktop modular synth ‘SoftPop2 SP2’

Bastl Instruments and close collaborators Casper Electronics have released the ‘SoftPop2 SP2‘ modular desktop synth. A remake of their 2017 cult machine, the ‘SoftPop2‘ is an entirely reworked instrument, combining the two designers’ flair for eccentric, playful, and unique hardware.

The SP2 develops on the magic of the initial SoftPop, reworking the original’s playful yet erratic sound generator prototype into a radical subtractive synthesis unit for production, with sequencable scales and a eurorack compatible patchbay.

The device can also process inbound audio via 3.5mm jack input, such as from a turntable or other sound sources, expanding the already extensive possibilities of sound generation into even broader realms.

The SoftPop2 SP2 is available to order now from Bastl Instruments and ships early February 2022. 


  • Fully analog signal path with integrated digital control
  • Patchbay with 37 Eurorack compatible patch-points for ultra-flexibility
  • Triangle core oscillator with PWM input and pulse and triangle outputs
  • State variable resonant filter with lowpass, bandpass, and highpass modes
  • 8 step sequencer with pattern chaining to extend the length
  • CV, gate, and clock outputs from the sequencer
  • External input for processing audio with dynamics analyzer
  • MIDI input for sync and musical control

In the box:

  • Softpop SP2
  • Quickstart guide
  • 5 patch cables (15cm: Green, Dark Green, Brown, Black and White)
  • Micro USB cable (excl. power supply)
  • Rubber feet
  • Sticker

Technical specs:

  • USB power (micro): <250mA
  • Dimensions: 173 x 112 x 41 mm
  • Inputs are capable of receiving eurorack signals
  • 16 pin protected eurorack power connector requires 5V from busboard: <250mA
  • Eurorack size rail adaptors available as open-source files
  • All outputs are 5Vpp except for
  • PULSE, EDGE, ENV, BP, and DYNAMICS that are 4Vpp