Spectrograms Preferences
From Audacity Development Manual
Revision as of 12:32, 2 December 2007 by JamesCrook (talk | contribs)
Summary
-- This is a pre V.1.3.2 image --
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Spectrograms
You can view any audio track as a Spectrogram instead of a Waveform by selecting one of the Spectral views from the track's pop-up menu. This dialog lets you adjust some of the settings for these spectrograms.
- FFT Size: The size of the Fast Fourier Transform (FFT) affects how much vertical (frequency) detail you see. Larger FFT sizes give you more low frequency resolution and less temporal resolution, and they are slower.
- Grayscale: Select this for gray spectrograms instead of colored ones.
- Maximum Frequency: Set this value anywhere from a couple of hundred hertz to half the sample rate (i.e. 22050 Hz if the sample rate is 44100 Hz). For some applications, such as speech recognition or pitch extraction, very high frequencies are not important (visually), so this allows you to hide these and only focus on the ones you care about.
