GR-1 Hardware Granular

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The GR-1 Granular Synthesizer is a hardware musical instrument, offering hands-on controls to create characteristic textures and pads.

The GR-1 is a hardware polyphonic granular synthesizer in a class of its own. The GR-1 is capable of creating textures, characteristic sounds, drones, soundscapes, pads etc. with the help of your creativity! A sample and a few knob tweaks is enough to create something beautiful!

The GR-1 is massively polyphonic: 128 grains per voice, up to a total of 1000 grains in parallel. It employs 32 bit mixing and a HIFI stereo DAC for rendition. A 7″ full colour display that is typically only found in top class synthesizers. It can use (USB or DIN) MIDI keyboards, USB sticks/disks, USB audio interfaces, and even PC keyboards. Yet it also features CV interfaces for integration with Modular (Eurorack) systems.

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GR-1 Showcases & Testimonials

  • 128 grains per voice
  • 11 voice polyphony
  • 4 part multitimbral
  • Standalone or MIDI controllable
  • MIDI IN & MIDI THRU connection with DIN and USB MIDI
  • High quality stereo audio: internally: 32 bit float, DAC: 44.1KHz
  • High quality headphone amplifier with volume control
  • 800 x 480 pixel, 7” TFT true color display
  • Raspberry Pi3 inside: massive DSP power and easy to service
  • Firmware updates via USB
  • Sample file uploads in multiple formats via USB
  • Sampling using USB sound cards
    • Record and save samples
    • Use as granular looping FX
  • The GR-1 can handle 32 sample files of 10 MB (about 2 min)
  • Performances can be saved to internal (4GB) or external (USB) memory.
  • Patches and samples can be saved to USB.
  • 2 control voltage assignable inputs [0-5V] with voltage protection
  • 1 gate output
    • 12dB/oct digital multimode filter with direct and MIDI controls
    • 2 assignable LFO’s with waveforms (sine, random, saw, square,custom) and direct controls
    • 4 banks of 8 presets all hands-on accessible and overwritable
    • ADSR amplitude envelope and Grain window envelope with direct controls
    • Rotary encoder for configuration, file/sample selection. Config menus provide many more possibilities beyond what the pots and sliders offer.
    • 32 x 21 x 7 cm aluminum casing
    • Full MIDI control: All on-board, and internal controls are represented as MIDI CC. Full support for program change, pitch bend, and high CC’s.
    • Full MIDI Polyphonic Expression (MPE) support
    • 3 area keyboard split with pitch on/off, and note to sample position mapping
    • MIDI clock sync with MUL/DIV, key sync on LFO frequency, and grain density
    • Ability to read and write many USB stick or drive formats: FAT, ExFat, Ext4 (Linux)
    • Recording of custom (AUX) LFO waveform using slider
    • Four on-boards effects: Delay, Reverb, Overdrive, Reducer
    • Sub-oscillator per voice with hi/lo balance
    • LFO1 to LFO2 cross modulation
    • LFO frequency to delay time sync
    • Precision sample loops (pseudo granular) with direct start and end controls