Graphical Spectrum Analyzer

The graphical spectrum function works in two video modes. By pressing <g> you will see the standard 640x480 mode. <SHIFT>+<g> will start the spectrum in 1024x768 mode. Apart from this difference the two video modes are equal.

Pressing <g> more than once toggles between the usual stereo, mono and single channel mode for calculating and showing the spectrum. <Pgup> and <Pgdown> adjust the frequency range. <Home> will set the frequency to 2756Hz. To half the resolution (and yet speed up the calculation) press <ALT>+<g>.

<Tab> change the palette of the graphical spectrum. <SHIFT>+<Tab> do the same for the standard spectrum analyzer at the bottom.

If you have difficulties interpreting this function here is a short explanation. The standard spectrum analyzer at the bottom shows you the frequency spectrum at the current moment. The higher a single bar, the louder the frequency. Now imagine looking at this spectrum from top, now every bar becomes a single dot. The height of the bar is now coded into different colors (from black $\leftrightarrow$ low to yellow $\leftrightarrow$ high). Now we can draw these point along the screen and see the spectrum as is progresses over time. This is somewhat a ``3D'' view of the spectrum, with the frequency coded along the y-axis, intensity coded in different colors and the time along the x-axis.