The guitar setup app
that listens.
Acoustic physics and high-precision audio analysis in your browser. Measure per-fret intonation, sustain, buzz, and body resonances using an audio interface - and see every fret's intonation down to the cent.
From sound to setup in three steps
No special sensors or cables required. Your browser listens, models acoustic physics, and gives you actionable repair instructions.
Plug in and play
Connect your guitar to an audio interface and pluck notes across the fretboard. For the tap test, your phone's microphone is enough.
Instant audio analysis
Intelligent acoustic algorithms analyze harmonics, sustain decay, buzz, and body resonance frequencies in real time.
Setup actions & PDF
Get per-fret intonation in cents, saddle and nut slot diagnostics, dead note analysis, and verifiable condition reports.
What Fretoscope discovers in your guitar
Deterministic physics modules detect mechanical defects, separate them from natural body resonance, and keep a complete instrument history.
Fretboard Scanner
Chromatic scan across every fret. Heatmaps of intonation deviation, sustain T60, buzz severity, and harmonic decay.
Saddles & nut geometry
Shows how many cents each saddle is off and detects high nut slots that distort first-fret tuning.
Tap spectrum & body modes
Maps soundboard and neck modal frequencies, Q-factors, and air resonance from firm taps near the bridge or neck.
Dead notes & acoustic profile
Separates structural neck absorption spots from high frets, preventing unnecessary fret leveling on healthy guitars.
Side-by-side comparison
Overlay measurements across time to monitor string aging, bridge compensation changes, or compare instruments.
Guitar passport & PDF reports
Setup history, gauge records, and workshop condition reports with verifiable QR links for luthiers, buyers, and players.
Lab-grade audio tools in a browser tab
Open the workshop and test any tool without installing drivers, software, or registering.
Give your guitar the setup it deserves
Measure your guitar right now or explore the workshop tools with zero setup.