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iSpectrum - Macintosh Audio Spectrum Analyzer

iSpectrum is an easy to use audio spectrum analyzer that allows you to view live audio in a standard frequency plot, a stereo oscilloscope view and a waterfall display.

You can adjust the display resolution, center frequency and save images to disk.

iSpectrum is used by Amateur Radio Operators, Audiofiles, Musicians, Sound Technicians and Educators.


  • Audio spectrum analyzer.
    • Spectrum Display.
    • Waterfall Frequency Display.
    • Oscilloscope View.
  • 6 User selectable bandwidth resolutions.
  • User selectable center frequency.
  • User selectable input gain.
  • Works with built-in, system and USB microphones.
  • Displayed images can be saved to disk.
  • Point-and-click frequency marker.
  • Auto centering of marker frequency when switching bandwidth.
  • Choice of FFT window functions.
  • User selectable sample averaging.


  • Audio input device.

Online Manual

Subscribe to the iSpectrum Group

Hitsquad Music Software Downloads


Download iSpectrum v2.05
For MacOS (10.3 - 10.7 Intel & PPC)

Download iSpectrum v2.09
For MacOS (10.6 - 10.8 Intel)

Download iSpectrum v2.10
For MacOS (10.6 - 10.10 Intel)

  • Changes for Mavericks.
  • Fixed missing audio device crash.

iSpectrum is FREE!

If you find iSpectrum useful, please consider donating something towards it's support costs. Thanks!