Unfiltered Audio's LION synthesizer offers a dynamic dual-oscillator design, each featuring 26 distinct modes that cover a broad spectrum of synthesis techniques including FM, subtractive, additive, microsound, noise, and stacked oscillators. Both oscillators include an optional Stereo mode, allowing for rich spatial effects, while modulation options such as unison depth and tuning Drift contribute to lush, evolving soundscapes. This flexibility makes it suitable for crafting a wide range of textures from subtle nuances to bold sonic statements.

The synthesizer’s mixer section introduces unique oscillator combination modes beyond a traditional crossfader, with experimental algorithms like Min-Max, Ring Mod, and others that create complex interactions between oscillators. Users can further shape their tone with 16 different filter types, including low-pass, high-pass, and bandpass, adding depth and character to the sound. Complementing these features is the renowned BYOME effect row, which includes over 40 modulateable effects, enabling detailed and expressive effect chains. A comprehensive factory library of 600 presets spanning multiple genres ensures immediate creative inspiration.

LION also features an advanced modulation system with full MPE support, allowing nuanced control over parameters such as filter cutoff and oscillator timbre via MIDI input and velocity, ideal for expressive playing with controllers like the ROLI Seaboard or Sensel Morph. The refined randomization engine lets users introduce subtle variations or create entirely new patches, enhancing sound design possibilities. The user interface is thoughtfully designed as a single-page layout with a tag-based preset browser, providing an intuitive experience for both beginners and advanced producers.