Firmware & Alt. Instruments › Nebulae v2 FM Grit Image 1 of 1 Nebulae v2 FM Grit $0.00 Download The InstrumentCreated by Collin Russell. FM synth that generates gritty waveforms with an extreme C:M ratio and modulation index.Get The Quickstart Guide Get notified by email when this product is back in stock! Add To Cart Added! Download The InstrumentCreated by Collin Russell. FM synth that generates gritty waveforms with an extreme C:M ratio and modulation index.Get The Quickstart Guide