audioprism is a spectrogram application that visualises the frequency content of audio signals. It supports live audio captured through PulseAudio and recorded material stored in WAV files.
In real-time mode, the application displays a continuously updating spectrogram in an SDL window. This makes it possible to observe sound from a microphone or monitor audio being played through another program, depending on the configured PulseAudio source.
The application can also convert an audio recording into a static spectrogram image. Its command-line options provide detailed control over the transformation and appearance of the resulting visualisation.
This is free and open source software.
Key Features
- Real-time spectrogram visualisation of PulseAudio input sources.
- Capture audio from microphones and available PulseAudio monitor sources.
- Generate spectrogram images from WAV audio files.
- Export spectrograms in image formats supported by GraphicsMagick.
- Display live visualisations in an SDL window.
- Configure the width and height of the spectrogram display.
- Horizontal and vertical spectrogram orientations.
- Full-screen visualisation mode.
- Adjustable audio sampling rate.
- Configurable discrete Fourier transform size.
- Select Hann, Hamming, Bartlett or rectangular window functions.
- Adjust overlap between successive analysis windows.
- Linear and logarithmic magnitude scales.
- Configurable minimum and maximum intensity values.
- Heat, blue and greyscale colour schemes.
- Interactive keyboard controls for adjusting live visualisations.
Website: github.com/vsergeev/audioprism
Support:
Developer: Ivan A. Sergeev
License: GNU General Public License v3.0
audioprism is written in C++. Learn C++ with our recommended free books and free tutorials.
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