Spectacle

A graphical spectral analyzer

Introduction

Spectacle is a real-time spectral analyzer using the short-time Fourier transform, available as LV2 audio plugin and JACK client.

• display the spectrum on logarithmic musical scale
• control the parameters of the analysis that affect latency and precision
• have zoom functionality and smooth interpolation
• identify the value under cursor and the peaks

Controls

• resolution: number of frequency points evaluated by STFT, greater CPU load in high values
• step: linked to the rate of STFT updates, faster when low but also more CPU consuming
• attack time: reaction delay to rapid increases of amplitude
• release time: reaction delay to rapid decreases of amplitude

Change log

1.0

• initial release

Contributors

• @trebmuh, LibraZiK: documentation
• @rghvdberg: software name
• @alcomposer, @unfa: suggestions for improvement