Spectrograms Preferences

You can view any audio track as a Spectrogram instead of a Waveform by selecting either "Spectrum" or "Pitch (EAC)" from the Track Drop-Down Menu. Spectrogram Preferences lets you adjust some of the settings for these two views.

FFT Window

• Window Size: The popup menu lets you choose the size of the Fast Fourier Transform (FFT) which affects how much vertical (frequency) detail you see. Larger FFT sizes give more low frequency resolution and less temporal resolution, and are slower.
• Window type: Determines precisely how the spectrogram is computed. 'Rectangular' is slightly faster than other methods, but introduces some artefacts. All methods give broadly similar results.

Display

• Minimum Frequency: This value will correspond to the bottom of the vertical scale in the spectrogram. Frequencies below this value will not be visible.
• Maximum Frequency: This value corresponds to the top of the vertical scale. The value can be set anywhere between 200 Hz and half the current sample rate of the track (for example, 22050 Hz if its rate is 44100 Hz). For some uses such as speech recognition or pitch extraction, very high frequencies are not visually important, so this allows you to hide these and only focus on the important ones.
• Show the spectrum using grayscale colors: Shows gray shades in the Spectrum view instead of full colors.

Can someone who knows what they mean fill in the Gain, Range and Frequency Gain explanations? -BillW

ToDo The frequency levels are quite confusing in the context of the Pitch EAC view, and obviously have no effect on the visible display, yet the text suggests otherwise. Can we give a better explanation?