Spectrum Analyzer Desktop

RTA (FFT / Spectrogram)

Only for Mac

Free · In-App Purchases

Mac

This RTA app supports simultaneous display of "Audio Waveform", as well as the FFT-based "Amplitude Spectrum" (frequency magnitude) and "Spectrogram" (frequency distribution over time), for audio signals input from a microphone. (FFT: Fast Fourier Transform, RTA: Real Time Analyzer) === Features === - Selectable configuration of Waveform / Spectrum / Spectrogram display. - Selectable FFT size, spectrum Average, window function. - Selectable frequency weighting (A-weighting, C-weighting, Z-weighting) - Selectable the type of expressing the X direction (frequency) of Spectrum / Spectrogram. (Linear, Log) - Display of spectrum peak level and peak frequency - Peak Hold (displays held past peak values of the spectrum) - Octave Analysis (displays the spectrum grouped into octave bands) - Audio signal generation (4 waveform types) - Pitch meter display - Zoomed waveform and spectrum display If you purchase the Pro version via In-App Purchase, you can use the following features. - FFT sizes: 4096, 8192, 16384, 32768 (for more precise spectrum analysis) - Log output (saves analysis results in CSV format) === Feature Details === [Screen Layout] View Num : 1, 2 View Type : - 1 screen : Wave (Waveform) / 1D (Spectrum) / 2D (Spectrogram) - 2 screens : W+1D (Waveform + Spectrum) / W+2D (Waveform + Spectrogram) / 1D+2D (Spectrum + Spectrogram) Layout : Vertical (displayed vertically), Horizon (displayed horizontally) [FFT Size] 1024, 2048, 4096, 8192, 16384, 32768 (* 4096 and above are available in the Pro version.) [Spectrum Average] Number of spectrum average for a display of spectrum. (init value: 1) (1, 2, 4, 8) [Window Function] Hanning, Hamming, Blackman, None [Frequency Weighting] Selectable frequency weighting (used when measuring sound pressure level with sound level meters): Flat (Z-weighting), dBA (A-weighting), dBC (C-weighting) [Frequency Axis Scale Type] Linear, Log [Peak Hold] Displays held past maximum (peak) spectrum values. [Octave Analysis] - Division method: FFT (Spectrum), 1/12, 1/6, 1/3, 1 octave (Octave bands) - Calculation method: Max, Average [Pitch Meter] Displays spectrum peak frequency as a meter and musical pitch (e.g., C3, G#4): [Audio Signal Generation] Configurable generated audio signal: - 4 waveform types: Sine, Triangle, Square, Sawtooth - Frequency: 20 Hz - 20,000 Hz === Other === - Background color selection: Black, White - WaveForm: Line Color (Green, Yellow, Invert), Line Width (1.0 ~ 6.0 px) - Spectrogram: Display range (-150 ~ -60 dB), Display time (4 ~ 60 sec) - X/Y zoom and scroll display for waveform/spectrum view

Ratings & Reviews

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- Added an FFT size of 32768. (4096 ~ 32768 are available in the Pro version.) - Added dB values alongside frequency values when tapping the spectrum. - Improved the logarithmic frequency axis to show finer numerical labels when zoomed in.

Version 1.4.1

The developer, Loop-Sessions.LLC., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Provider
    • Loop-Sessions.LLC.
    Size
    • 1.1 MB
    Category
    • Music
    Compatibility
    Requires macOS 15.0 or later.
    • Mac
      Requires macOS 15.0 or later.
    Languages
    • English and Japanese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © Loop-Sessions.LLC.
  • Developer Website
  • Privacy Policy

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