Sustain Measurement with Sustain Analyzer

Sustain Analyzer estimates how fast the harmonics levels of a note decrease over time.
The level and sustain envelopes of a note’s harmonics define its timbre.
The app shows amplitude graphs of each measured harmonic and its sustain as dB/s metric and decay time (seconds, T60).
Alternatively the app can display the harmonics’ sustain as bargraphs (dB/s).

Sustain graphs of an electric guitar note:

Sustain measurement: harmonic-wise bargraph view of Sustain Analyzer:

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