🧱 The Audio Spectrogram - articulateinstruments/AAA-DeepLabCut-Resources GitHub Wiki

Spectrogram Display

The spectrogram is based on a Hanning windowed FFT with 0.97 pre-emphasis. The resolution of this display can be changed using the ‘Options:Settings:Spectrogram’ menu option. A value of 6 or 7 bits corresponds to a ‘Wideband spectrum’ which emphasises the formant structure of the speech. A value of 8 or 9 corresponds to a ‘Narrowband spectrum’ which emphasises the harmonic (pitch) structure of the speech.
The spectrogram colours can be changed to suit using the right click popup menu to call up the spectrogram colours dialogue.

Figure 19 Spectrogram Colours Dialogue

The default colour scale is defined by only 2 colours, however it is possible to create more exiting spectrograms using a range of colours. The ‘Number’ box allows up to 6 colours to be chosen.

The range of spectral power over which these colours are applied is determined by adjusting the cursors on the colour bar.

The spectrogram disply can be manually refreshed by using the right click popup menu option, ‘Refresh’.