Finesse — Manual

The history of audio mixing is, in many ways, a history of managing resonance. When the first recording engineers placed microphones in front of orchestras, they immediately confronted the resonant characteristics of concert halls, instruments, and the microphones themselves. Early graphic equalizers were crude tools designed primarily to combat these accumulations of energy at specific frequencies — the boomy room modes, the harsh resonances of ribbon microphones, the cabinet coloration of monitoring systems.

What is a resonance? In its purest form, it's a frequency region where the physical properties of a system cause energy to accumulate and persist. A guitar string resonates at its fundamental frequency and harmonics. A room reinforces certain frequencies based on its dimensions. A filter circuit in a vintage equalizer exhibits Q-factor resonance at its center frequency. These resonances are not defects — they are the very essence of timbre, the fingerprint that allows us to distinguish a violin from a viola, or a vintage Neumann from a modern condenser microphone.

But there exists a threshold beyond which resonance becomes problematic. Excessive resonances create masking — the psychoacoustic phenomenon where energy in one frequency band reduces our ability to perceive detail in adjacent or overlapping bands. When a snare drum's fundamental masks the clarity of a bass guitar, or when sibilance obscures vocal intimacy, the mix loses transparency. This is not merely a technical issue but a perceptual one, rooted in how our auditory system processes overlapping spectral information.

The evolution of mixing tools mirrors our growing sophistication in understanding this balance. In the 1960s and 70s, parametric equalizers offered precise frequency selection and bandwidth control, but their static nature meant compromises: reduce the resonance too much and you lose character; leave too much and you sacrifice clarity. The 1980s brought multiband dynamics processors based on analog crossover networks, yet their frequency resolution was typically limited to just 2–6 bands — broad strokes compared to the hundreds or thousands of frequency regions that modern spectral processing can address simultaneously. Real-time FFT processing, while theoretically possible, remained computationally impractical for professional audio applications.

Modern digital signal processing has enabled a new paradigm: frequency-dependent dynamic control with fine spectral resolution, preserving phase relationships and transient integrity while adapting in real-time to the music's needs.

For masking itself is not always the enemy. In skilled hands, allowing one element to partially mask another creates the front-to-back depth that makes a mix feel three-dimensional. A subtle wash of cymbal overtones can "wrap" a drum kit, making it feel cohesive rather than isolated. Vocal harmonics can create an intimate "veil" that draws the listener closer. The difference between transparency and sterility often lies in these subtle maskings — the ones we choose to preserve.

But the temporal nature of resonance perception adds another layer of complexity. This phenomenon is well-documented in psychoacoustic literature: our auditory system judges problematic resonances not just by amplitude, but by duration — and this threshold varies dramatically across the frequency spectrum. A bass frequency might ring for 300–500 milliseconds before we perceive it as excessive, while a cymbal resonance becomes harsh and fatiguing after just 50–100 milliseconds. This frequency-dependent temporal sensitivity explains why static processing often fails: settings aggressive enough to tame harsh highs will choke the natural sustain of low frequencies, while gentle enough timing to preserve bass body leaves sibilance and metallic overtones intact. The result is the all-too-familiar sound of over-processed material — technically "controlled" but musically lifeless.

The goal, then, is not elimination but intelligent control: preserving the resonances that give music its life while managing those that obscure its message. This requires tools that understand the difference.

Finesse is a resonance reduction processor that intelligently manages resonances and spectral content with surgical precision, operating without fixed crossovers and utilizing minimum phase filtering that preserves transients and phase coherence. Unlike traditional dynamic processors that rely on crossover networks, Finesse operates across multiple frequency bands simultaneously through advanced filtering techniques, enabling precise control over tonal and dynamic character while maintaining optimal phase relationships throughout the frequency spectrum. This ensures that the natural attack and dynamic response of the source material remain intact while unwanted resonances are effectively controlled.

At its core, Finesse analyzes spectral content in real-time and applies frequency-dependent processing based on three customizable curves: Depth, Timing, and Guard. This approach enables control over problematic resonances while preserving the natural character and musicality of the source material. The system operates completely independently of input levels, providing true "set & forget" functionality that adapts automatically to any signal.

The bidirectional connection between sliders and curves employs an intelligent priority system to prevent feedback loops and ensure smooth operation:

When you adjust the main slider (Depth, Timing, or Guard), the corresponding curve handles update proportionally while maintaining their relative positions. Conversely, when you modify individual curve handles, the main slider automatically reflects the average of all active points.

This system uses a priority mechanism that gives precedence to the most recent user action. Whether adjusting via the plugin GUI or through DAW automation, Finesse ensures that intended changes are applied without conflicts or unwanted feedback. For automation purposes, it is recommended to use the main sliders (Depth, Timing, Guard) rather than individual curve points. Hold Shift while dragging the master slider to activate multiplicative scaling mode, preserving the relative proportions of curve points. (When dragging individual curve handles, Shift instead locks the frequency — see Curve Editing.)

Additional options can be accessed using the standard context menu. This is opened by Right-clicking on a blank area anywhere in the UI. A click outside of the menu closes it.

• Shortcuts… — opens the keyboard shortcuts configuration dialog.
• User Interface Scale — selects one of the three size presets defined in the settings dialog.
• Instance — rename the specific plug-in instance.
• Copy State (Ctrl + C) — copies the current control states to the clipboard.
• Paste State (Ctrl + V) — pastes the control states from the clipboard.
• Share State — opens a dialog with sharing options via e-mail or forums.

Default shortcuts:

• Active (toggle): E
• Delta (toggle): D
• Depth (− / +): Q / W
• Timing (− / +): A / S
• Guard (− / +): Y / X
• ReTilt (− / +): R / T
• Bands (− / +): F / G
• Output (− / +): V / B

Step keys increment or decrement the parameter using snap values for stepped control.

Finesse was conceived and developed by Jan Ohlhorst.
Documentation by Shane Johnson.

Software evaluation by:

Ady Connor, Aleksi Vuolevi, Andrew Boult, Audiobomber | Castlemastering, Bob Olhsson, Cyril Meysson, Dan Suter | echochamber, Dan Worrall, Dax Liniere | Puzzle Factory, Dean, Dennis J Wilkins | Studio 12 Below, Diogo C. Borges, Eden Puder, Eric Recourt, EvilDragon, Greg Reierson, Gregg Janman | Hermetech Mastering, Helmut Erler | mastering.heyrec.org, Ilya Orlov, Janne Hatula, Jean Dante, Jeffrey Rippe, Jerry Anthony Mateo, Joe Caithness Mastering, Joseph Lyons, Justin Perkins, Laurent Sevestre, Michael Wynne, Miro Pajic, Murray Campbell | Beatworld, Niklas Silen, Nil Hartman, Pete Grandison, Resoundsound Mastering, Rich Prewett, Richard Pentrose, Robi Bulesic, Roland Löhlbach, Ruairi O'Flaherty, Sean Diggins, Sergey Makeev, Thaddeus Moore | Liquid Mastering, Titanio Studios, Valentin Zvukofor, Vitaly Zolotarev.