What is Sprockit?

Sprockit is an open source hybrid analog and digital monophonic synthesizer. Sprockit is really Rockit’s little brother, or child if you will. It uses Rockit’s synthesis engine and filter design, just downsized to give you the opportunity to get in on the goodness at a lower price. Sprockit takes Rockit’s 19 pots down to 9, 8 switches down to 2, and 13 LEDs down to 6. All of the same parameters are still accessible via MIDI. So, with a MIDI control surface or DAW, Sprockit can perform just like Rockit.

  • The first rule of Rockit and Sprockit is open source. It’s completely open, from the hardware to the software. You’ll even find detailed design discussions here on my blog that demonstrate how I designed it and how you can modify it. Rockit’s source code is in C, the world’s best and easiest language. Don’t spend hours tracing variables though Assembly or trying to figure out C++ objects, when you can follow simple procedural C.
  • My fundamental design guideline has been to make almost all parameters instantly accessible. There are no menus, no submenus, no sub-submenus. My theory is that, if you’re going to make hardware make it hardware, not an embedded soft synth. Rockit is an excellent tool for making sounds. The options are all right in front of you all the time.
  • The second fundamental design guideline is that all parameters are MIDI accessible. There is no setting which cannot be accessed through a MIDI control channel. That includes all filter parameters.
  • Spockit has two oscillators, each with 16 waveshapes. They range from simple Sine, Square, Triangle, and Ramp, to complex morphing waveshapes with variable amount of pulse-width modulation and shape shifting. Both oscillators are selected with one knob, but each waveshape can be individually accessed via MIDI. Sprockit has a dedicated Detune knob for tuning oscillator 2 against oscillator 1.
  • To control the amplitude, Sprockit has two knobs. One knob controls Attack and the other knob controls the length of the note, by controlling the decay, sustain and release all in one knob.
  • The filter is all analog but it’s control is all digital. This leads back to the MIDI controllability and the option of altering it’s behavior with the software, which I remind you is open-source. Don’t like it? Change it.
  • Sprockit features a four-pole low pass filter with controllable resonance.
  • Rockit has an LFO for modulating any of its parameters. The LFO has 3 waveshapes directly accessible and 16 waveshapes accessible via MIDI.
  • Finally, Sprockit is fun to build. It’s available as a kit, so you can learn about electronics assembly on your way to having a kick-ass new synth.

Interested, buy it here. It’s always in stock and waiting to start or join your studio.

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