Harmonic Reinforcement Filter

HRF (Harmonic Reinforcement Filter) is an audio plugin designed to analyse and reinforce the harmonic structure of incoming audio in real time.

Rather than focusing only on EQ curves or dynamics, HRF listens to audio in terms of musical pitch relationships and harmonic balance. It continuously analyses tonal content across the frequency spectrum and applies subtle harmonic reinforcement to help instruments, vocals, synths, and full mixes lock together more naturally.

HRF can be used on individual tracks, buses, mix busses, mastering chains, or in sound design workflows to help improve clarity, cohesion, tonal stability, and perceived musical glue while preserving the character of the source material.

Designed for producers, mixing engineers, mastering engineers, and musicians, HRF provides a different approach to tonal enhancement by working directly with harmonic relationships within audio.

Features:

• Real-time harmonic analysis and reinforcement.
• Harmonic-aware spectral processing.
• Adjustable reinforcement strength and dry/wet control.
• Harmonic visualisation interface.
• Suitable for tracks, buses, mix busses, and mastering.
• Creative and corrective tonal enhancement workflows.
• VST3, AU, AAX, and Standalone support.
• Available for macOS and Windows.

Licensing options include:

• 14-day free trial.
• Monthly Rent-to-Buy subscription.
• Perpetual licence.
• Enterprise licensing available on request.