PerceptoMap

PerceptoMap is an open-source audio plugin (VST3) that visualizes psychoacoustic features of audio signals in real time. Built with JUCE, it's designed to help you see how we perceive sound — not just how it looks on a frequency plot.

Unlike typical spectrum or spectrogram analyzers, it supports perceptual visualizations such as Mel spectrograms, Mel-frequency cepstral coefficients (MFCCs), Chromagram, and soon also Tempogram etc., offering insight into how humans perceive sound.

Key Features:

• Real-time Mel Spectrogram display with perceptual frequency scaling.
• Real-time Mel-frequency cepstral coefficients (MFCCs) representing timbral texture and spectral envelope.
• Real-time Spectral Centroid tracking to visualize spectral brightness (center of mass of STFT spectrum).
• Real-time Chromagram showing the energy distribution across the 12 pitch classes (C to B), regardless of octave. [added in v0.5].
• Time–Frequency Reassignment mode for enhanced STFT resolution, based on the paper [hal-00414583: Time-Frequency reassignment: from principles to algorithms]. This mode sharpens the localization of spectral peaks by reassigning energy to more accurate time–frequency coordinates, making harmonic structures and transient details clearer compared to the standard STFT. [added in v0.6].
• Visual analysis of Tempogram and other psychoacoustic features (planned).
• Configurable color maps.
• Adjustable brightness gain and enhanced colormap modes to improve visibility of fine details in the spectrogram [added in v0.4].
• Optional dB scaling, log or linear frequency axis for classic linear STFT spectrogram.
• Freeze frame mode and interactive mouse hover to inspect frequency and loudness at any point.
• Configurable FFT size for balancing time resolution and frequency resolution.[added in v0.6].
• Independent scroll speed control, allowing smooth visualization at different FFT sizes and overlap settings without distorting the spectral data. [added in v0.6].