Guitar & Instrument Tuner
Requests microphone access, captures one 8192-sample frame at 48 kHz and estimates a monophonic pitch using a normalized YIN difference threshold of 0.15. It maps the estimate to equal-tempered notes with A4 = 440 Hz.
About this guitar & instrument tuner
Guitar & Instrument Tuner — browser-based utility.
How this tool works
Requests microphone access, captures one 8192-sample frame at 48 kHz and estimates a monophonic pitch using a normalized YIN difference threshold of 0.15. It maps the estimate to equal-tempered notes with A4 = 440 Hz.
- Play a steady 440 Hz A4 and click “Process locally”; allow microphone access if prompted and keep playing until the result appears.
Worked example
Scenario: Play a steady 440 Hz A4 and click “Process locally”; allow microphone access if prompted and keep playing until the result appears.
Sample input:
Illustrative output:
Limits and verification
Targets roughly 50–1200 Hz and rejects very quiet or nonperiodic frames. Noise, harmonics and multiple notes can cause errors. This is a single capture, not a continuous tuner; microphone tracks stop after capture.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- de Cheveigné and Kawahara (2002), YIN — normalized difference pitch estimation
- W3C Media Capture and Streams; Web Audio API
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Play a steady 440 Hz A4 and click “Process locally”; allow microphone access if prompted and keep playing until the result appears.
Frequently asked questions
How does Guitar & Instrument Tuner process the signal or file?+
Requests microphone access, captures one 8192-sample frame at 48 kHz and estimates a monophonic pitch using a normalized YIN difference threshold of 0.15. It maps the estimate to equal-tempered notes with A4 = 440 Hz.
How can I reproduce the Guitar & Instrument Tuner example?+
Play a steady 440 Hz A4 and click “Process locally”; allow microphone access if prompted and keep playing until the result appears.
What limits apply to Guitar & Instrument Tuner?+
Targets roughly 50–1200 Hz and rejects very quiet or nonperiodic frames. Noise, harmonics and multiple notes can cause errors. This is a single capture, not a continuous tuner; microphone tracks stop after capture.
What should I verify in the Guitar & Instrument Tuner output?+
The expected file or reported values are: A4; targetHz = 440; frequencyHz ≈ 440 Approximate values include decoder or estimator tolerances; random samples vary between runs.