sndpeek is a real-time audio visualisation and analysis application originally developed at Princeton University. It combines animated three-dimensional displays with several tools for examining the characteristics of sound.
The software can analyse microphone input or audio recordings, displaying waveform and spectral information as sound is processed. Its animated waterfall view is particularly useful for observing how frequency components develop and change over time.
sndpeek also calculates acoustic features that describe different properties of the signal. These measurements make it useful for audio research, educational demonstrations and experimenting with sound analysis.
This is free and open source software.
Key Features
- Real-time animated three-dimensional audio visualisation.
- Analyse microphone input and supported recorded audio files.
- Playback of WAV, AIFF, SND, RAW and MAT audio data.
- Time-domain waveform display showing signal amplitude.
- FFT magnitude spectrum showing the frequency content of audio.
- Three-dimensional waterfall plot illustrating spectral changes over time.
- Lissajous display for examining relationships between audio channels.
- Interactive rotation and scaling of the visualisation.
- Freeze-frame function for examining individual moments in the analysis.
- Real-time extraction of spectral centroid information.
- RMS measurements representing signal energy.
- Spectral flux measurements identifying changes in spectral content.
- Spectral rolloff measurements describing the distribution of high-frequency energy.
- Cross-platform support – runs on Linux, macOS, and Windows.
Website: www.gewang.com/software/sndpeek
Support:
Developer: Ge Wang, Perry Cook and Ananya Misra
License: GNU General Public License v2.0
sndpeek is written in C. Learn C with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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