Spectrum & pitch analyzer
See which frequencies your audio actually contains. Analyze a file for peaks and a waterfall view, or watch a live microphone spectrum. Everything stays on this device.
Analysis settings
Live input
The microphone is only monitored in this tab; nothing is recorded or uploaded.
Your file stays on this device. Analysis runs in a local worker; cancel any time and the worker stops immediately.
Good to know
Spectrum & pitch analyzer
Look beyond the waveform to see which frequencies are present in your audio. Load a recording for a spectrum and time-based waterfall, or monitor microphone input to compare sounds as they happen. Peak readings help you locate a persistent hum or inspect the harmonics of a test tone. The FFT size changes the balance between separating nearby frequencies and following quick changes; a larger setting is not automatically better. Freeze a spectrum to compare a later reading, and save a PNG when you need a visual reference. Analysis runs on your device. The display supports investigation and listening decisions, but it does not remove noise, identify every instrument, or establish a medical hearing result.
What each setting does
- File or microphone
- Analyze a local recording or enable live microphone input. Stop microphone monitoring when the comparison is finished.
- FFT size
- Choose 512–8192 samples. Larger windows separate nearby frequencies better; smaller windows follow rapid changes more closely.
- Freeze and image export
- Keep a spectrum frame for comparison, inspect peak readings, and download the displayed visualization as PNG.
Load a file and run analysis, or allow microphone access for live monitoring.
Choose an FFT size suited to sustained tones or fast changes, then inspect peaks and the waterfall.
Freeze a useful frame, compare another reading, and save a PNG if needed.
A few useful answers
A harmonic can be stronger than the fundamental. Noise and overlapping instruments can also dominate a frequency peak.