Radium is a virtual analog synthesizer designed to deliver rich, dynamic sounds with its 16-voice polyphony. It features two primary oscillators plus a sub oscillator, allowing for a wide range of tonal possibilities through subtractive and frequency modulation synthesis. The multi-mode state variable filter supports low-pass, high-pass, band-pass, and band-reject modes, offering flexible sound shaping options.

This synthesizer includes two host-synchronizable low-frequency oscillators (LFOs) and a 32-stage envelope generator with time and level controls that can also sync to the host tempo. Its integrated arpeggiator adds rhythmic complexity, while the MIDI learn function simplifies control assignments. Radium's interface includes a responsive XY pad for expressive modulation, alongside built-in effects such as auto pan, delay, and chorus that enhance the sonic palette.

Additional features include a CV sequencer dedicated to the filter, enabling intricate modulation patterns reminiscent of modular synthesizers. The synthesizer also offers comprehensive patch management, making sound storage and recall efficient for live performance or studio work. Radium combines classic analog-style synthesis with modern digital conveniences to inspire creativity across various music production styles.