Spek helps to analyze your audio files by showing their spectrogram (spectrogram is a time-varying spectral representation (forming an image) that shows how the spectral density of a signal varies with time. In the field of time–frequency signal processing, it is one of the most popular quadratic Time-Frequency Distribution that represents a signal in a joint time-frequency domain and that has the property of being positive.)
It allows you to monitor the spectral content of your audio signal in real time.
Uses your PC sound card to create audio frequencies in the range 100 to 15000 Hz
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