# Audio Frequency Analyzer

Real-time audio frequency spectrum analyzer with detailed frequency band analysis

> Canonical page: https://elysiatools.com/en/tools/audio-frequency-analyzer

- **Category:** Media

- **Keywords:** audio, frequency, analyzer, spectrum, eq, bands, analysis, professional

## Overview

Professional-grade frequency analyzer using Web Audio API. Displays real-time frequency spectrum across multiple bands (bass, low-mid, mid, high-mid, treble) with peak hold, dB scale, and frequency response curves. Essential for audio engineers, music producers, and sound designers.

## When to use

- When mixing or mastering music to identify muddy frequencies or harsh resonances in real time.
- When testing audio equipment, microphones, or room acoustics to map out frequency response curves.
- When sound designing or editing podcasts to ensure balanced levels across bass, mid, and treble bands.

## How it works

- Grant microphone access or play an audio signal to feed the input into the analyzer.
- The Web Audio API processes the incoming signal using Fast Fourier Transform (FFT) to calculate real-time frequency data.
- The interactive chart displays the frequency spectrum, highlighting specific bands from bass to treble with peak hold indicators and a dB scale.

## Use cases

- Detecting and isolating feedback frequencies during live sound setups or rehearsals.
- Analyzing the frequency balance of a voiceover track to apply precise EQ cuts or boosts.
- Visualizing the frequency response of hardware synthesizers or instrument signals.

## Frequently asked questions

### How does the analyzer capture real-time audio?

It uses the Web Audio API to capture input from your microphone or system audio device directly within your browser.

### What frequency bands does this tool analyze?

It splits and monitors the spectrum across five main bands: bass, low-mid, mid, high-mid, and treble.

### What is the purpose of the peak hold feature?

Peak hold temporarily retains the highest decibel level reached at each frequency, helping you spot transient spikes easily.

### Does this tool store or upload my audio recordings?

No, all audio processing is performed locally in your browser using the Web Audio API; no audio data is sent to any server.

### Can I use this to calibrate my studio monitors?

Yes, by playing pink noise through your monitors and analyzing the response curve, you can identify acoustic peaks and nulls in your room.

## Related tools

- [Audio Phase Analyzer](https://elysiatools.com/en/tools/audio-phase-analyzer): Real-time stereo phase correlation analyzer for mono compatibility checking
- [3D Spectrum Analyzer](https://elysiatools.com/en/tools/audio-spectrum-analyzer-3d): Audio spectrum analyzer with 3D isometric visualization
- [Audio Spectral Filter](https://elysiatools.com/en/tools/audio-spectral-filter): Filter audio based on its spectral content
- [Chord Progression Finder from Melodic Sketch](https://elysiatools.com/en/tools/youtube-music-chord-finder): Enter a melodic contour as scale degrees (1-7 or do-re-mi) plus a target key, and get candidate diatonic chord progressions ranked by voice-leading smoothness, with roman-numeral analysis and an audio demo.
- [Audio Visualizer Player](https://elysiatools.com/en/tools/audio-visualizer-player): Play audio files with real-time frequency visualization
- [Audio BPM Detector](https://elysiatools.com/en/tools/audio-bpm-detector): Detect the beats per minute (BPM) of a music track
- [Audio Caption Sync Checker](https://elysiatools.com/en/tools/audio-caption-sync-checker): Compare SRT or WebVTT cue timing with likely speech activity and flag timing drift.
- [Audio Chord Progression Detector](https://elysiatools.com/en/tools/audio-chord-progression-detector): Estimate an audio file's chord sequence locally and download CSV, JSON, SVG, and method notes in one ZIP.

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows

## Related content

- [Audio Analysis and Visualization Tools](https://elysiatools.com/en/hubs/audio-analysis-and-visualization-tools): Visualize audio, inspect stereo, diagnose signal and timing, and check files before delivery.