FRMS is a hybrid synthesizer that blends Granular, FM, Subtractive, and Additive synthesis into a single powerful instrument. Its flexible layering system allows users to combine up to four layers of synthesis simultaneously, each acting as either a granulator or an oscillator. This approach opens up a wide sonic palette, from rich ambient textures to intricate glitch sounds, making it easy to transform simple audio into complex, evolving soundscapes.

The synthesis engines offer extensive creative control, featuring multiple FM modes and the ability to granulate samples or live audio input. The interface is designed for streamlined workflow, providing split views and intuitive controls for managing all layers and parameters. Users can browse a high-quality sample library, import their own sounds, and take advantage of modulation matrices, envelopes, filters, and polyphonic capabilities to sculpt unique tones.

Additional tools like an arpeggiator with various modes, layered delay and reverb effects, and MPE compatibility enhance the expressive potential of the synthesizer. Integration with Ableton Link ensures smooth synchronization in live or studio setups. This synth supports up to four voices of polyphony and includes a built-in audio recorder, delivering a comprehensive sound design environment with lifetime free updates for ongoing improvements.