Spectrum Analyzer

The Spectrum Analyzer analyzes the selected audio, computes the average spectrum, displays it in a two-dimensional graph, with frequency range on the x-axis and level distribution on the y-axis.

Spectrum Analyzer Settings

To open the Spectrum Analyzer, select Audio > Spectrum Analyzer.

The Spectrum Analyzer shows the following settings:

Size in Samples: Determines a size for the analysis blocks of the audio. The higher this value, the higher the frequency resolution of the resulting spectrum.
Size of Overlap: Determines overlap between each analysis block.
Window used: Selects which window type is used for the fast Fourier transform, the mathematical method used for computing the spectrum.
Normalized Values: Activate this to scale the resulting level values, so that the highest level is displayed as 1 (0 dB).
From Stereo: Specifies which channel is analyzed.
Process: Analyzes the spectrum and opens the spectrum display.

Spectrum Display

The Spectrum Display shows the following settings:

Frequency display: Allows you to compare the levels between frequencies. Move the pointer to one of the frequencies, right-click and move the pointer to the second frequency. The difference in level between the positions is displayed and labeled D in the upper right corner.

Note
For stereo audio the display in the upper right corner shows the values for the left channel. To see the right channel values, hold down Shift.
dB: Activate this option to show dB values on the vertical axis. Deactivate this option, to show values between 0 and 1.
Freq. log: Activate this option to display the frequencies on the horizontal axis on a logarithmic scale. Deactivate this option, to show a linear frequency axis.
Precision: Indicates the frequency resolution of the graph. This value is governed by the Size in Samples setting in the spectrum analyzer settings.
Frequency/Note: Allows you to select if the frequencies are displayed in Hertz or with note names.
Min.: Sets the lowest frequency shown in the graph.
Max.: Sets the highest frequency shown in the graph.
Active: Activate this option to open the next Spectrum Analysis dialog in the same window. Deactivate this option to show the next dialog in a separate window.