Audio File Analyzer
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Description
This app supports simultaneous display of the "audio waveform" and the FFT-based "amplitude spectrum" (frequency magnitude) for audio files on your device.
(FFT: Fast Fourier Transform)
You can check the frequency components around the current playback position while playing the file.
[Features]
Simultaneous display of audio waveform and a real-time spectrum linked to the playback position.
Supports both portrait and landscape orientation.
Channel display switching (Mix / L / R).
Displays the peak level of the spectrum and its frequency.
Supports zooming in the frequency direction of the spectrum.
Pitch meter display.
Supports transcription (iOS 26 ~).
[Spectrum Display Settings]
Frequency Axis: Linear, Log
FFT Size: 1024, 2048, 4096, 8192, 16384 (* 16384 is available in the Pro version)
Window Function: Hann, Hamm, Blkman, None
Octave Analysis: FFT, 1/12, 1/6, 1/3, 1, Calc Method: Max, Ave
[Transcription screen] (* Available on iOS 26 or later.)
Transcribes speech in the selected audio file.
The results are divided into recognized speech segments and displayed in cells with their start times.
Tap a cell to move to that position.
The Pro version offers Ad-Free Viewing and High-Resolution Analysis (FFT size: 16384).