Plugin Reference

SotF includes 41 audio processing plugins. Click any plugin for its full parameter reference.

Processing Plugins

Plugin	Description
Parametric EQ	Biquad-based parametric equalizer with peak, shelf, and pass filters. Supports multiple filter bands for precise frequency response shaping.
Gain	Simple volume control with smooth gain ramping to prevent clicks.
Compressor	Dynamic range compression with configurable threshold, ratio, attack, release, and makeup gain.
Expander	Dynamic range expansion with configurable threshold, ratio, attack, release, and range. Opens up dynamics below the threshold.
Multiband Compressor	Per-band dynamic range compression with 2-5 frequency bands and independent compressor settings per band.
Multiband Expander	Per-band dynamic range expansion with 2-5 frequency bands and independent expander settings per band.
Gate	Noise gate that silences audio below a configurable threshold.
Limiter	Peak limiter to prevent clipping. Ensures output never exceeds the ceiling level.
Delay	Audio delay with configurable delay time per channel.
Convolution	FFT-based convolution engine for applying impulse responses (room correction, cabinet simulation, reverb).
Matrix Mixer	Channel matrix mixing with per-routing gain control. Route any input channel to any output channel.
Channel Mute/Solo	Per-channel mute, solo, and dim controls with smooth fade transitions.
Upmixer	Stereo to surround upmixing (2ch to 5.0/5.1/7.1) using FFT-based spatial decomposition and VBAP panning.
Downmix	Surround to stereo downmixing with configurable channel contributions.
Binaural Renderer	HRTF-based 3D spatial audio rendering. Converts multichannel audio to binaural headphone output using SOFA files.
Crossfeed	Headphone crossfeed that simulates speaker spacing. Supports Bauer, Meier, and multiband algorithms.
Crosstalk Cancellation (XTC)	Crosstalk cancellation for speaker playback. Creates a wider stereo image by cancelling inter-speaker interference.
Perceptual Noise Diffusion	Perceptual noise diffusion (PND) for improving perceived audio quality through controlled noise shaping.
Loudness Compensation	Equal-loudness contour compensation (Fletcher-Munson). Adjusts frequency response based on playback volume to maintain perceived tonal balance.
Mono to Stereo	Converts mono signals to stereo output.
Denoiser	Audio denoising using MCRA (Minima Controlled Recursive Averaging) and Wiener filtering.
A/B Compare	Side-by-side A/B comparison. Instantly toggle between processed and bypass to evaluate your plugin chain.
Band Split	Splits the audio signal into separate frequency bands for independent processing.
Band Merge	Merges previously split frequency bands back into a single signal.
Acoustic Echo Cancellation	Cancels acoustic echoes from microphone input using reference signal correlation.
Beamformer	Microphone array beamforming for directional audio capture.
De-Esser	Sibilance reduction targeting harsh high-frequency content (s, t, sh sounds).
Dither	Adds dither noise for bit-depth reduction, minimizing quantization distortion.
Dynamic EQ	Frequency-dependent dynamic equalizer that adjusts filter gain based on signal level.
Linear Phase EQ	Zero-phase parametric equalizer using FFT convolution. No phase shift, but adds latency.
Saturation	Harmonic saturation and soft clipping for adding warmth and character.
Spectral Compressor	Frequency-dependent compression operating in the spectral domain for transparent dynamic control.
Stereo Imager	Controls stereo width from mono to extra-wide, using mid/side processing.
Transient Shaper	Shapes attack and sustain characteristics of audio transients.
Ambisonics	Ambisonics encoding and decoding for immersive spatial audio.
Spectrum Analyzer	FFT-based spectrum analysis with configurable bin count, frequency range, smoothing, and tilt correction.
Active Acoustic Enhancement	Active acoustic enhancement using psychoacoustic processing to improve perceived clarity, presence, and depth.
Declick	Removes clicks, pops, and short transient defects from audio (vinyl restoration, recording artifacts).
Hiss Reducer	Reduces high-frequency hiss and tape noise while preserving program content.
Speech Denoiser	Neural speech-focused denoiser (RNNoise-derived) optimized for voice and dialogue cleanup.
Dither	Adds dither noise for bit-depth reduction, minimizing quantization distortion.