ToneDex

ToneDex is an experimental tool for musicians who want to better understand and compare the tone quality of their instrument sounds using objective, scientific parameters.

This app allows you to:
Record your instrument sound (auto-stops at 5 seconds)
Check pitch stability by Tuner
Analyze the sound using 5 key parameters:
RMS (Loudness/Power)
ZCR (Noise / Breathiness)
Spectral Centroid (Brightness / Sharpness)
Bandwidth (Timbre Spread)
Brightness Index (High-frequency emphasis)

Visualize results in Z-score-based bar graphs
Rename and organize recordings
Share analysis results and graphs
ToneDex is designed especially for wind and acoustic instrument players who want to explore differences in setup, technique, or equipment (e.g., mouthpieces, reeds, embouchure).
While originally designed for saxophone comparison, it can be used for any monophonic instrument that produces steady tones.
No external data is collected or transmitted. All recordings remain on your device.
If you're trying out new mouthpieces, comparing tone qualities, or simply want a fresh perspective on your sound, ToneDex offers a structured and visual way to reflect on your tone.