Spectrum Analyzer
View the average frequency spectrum of your audio with 1/3 octave bands and A/C/Z weighting options. Shows frequency distribution, not how it changes over time — use the Spectrogram Viewer for that.
Frequently Asked Questions
- What do the octave bands show?
- 1/3 octave bands group the frequency spectrum into standard bands used in acoustics and audio engineering, making broad tonal balance easier to read than a raw FFT line.
- What is A/C/Z weighting?
- These are standard frequency-weighting curves. A-weighting approximates human hearing sensitivity at low levels, C-weighting is closer to flat at higher levels, and Z-weighting (zero) applies no weighting at all.
- How is this different from the Spectrogram Viewer?
- This tool shows the average frequency distribution of a file. The Spectrogram Viewer instead shows how frequency content changes over time.
Selected files are processed locally in the browser and are not uploaded to TrueRes for processing. Open this page in a modern browser to use the interactive tool.