This small application displays a spectrum analyser on the screen, while Desktop Tracker plays its tune (or when you edit it). It can also display which voices are currently playing.
Two windows will appear, one labelled Notes, the other Voices. The notes window displays the notes that are being played, while the voices window displays the voices that are being played. These look like:
If you don't like the bars, then you can edit them, by using !Paint, and the Sprites file from within the !DTTBars application. The sprite's name is bar, but you must not edit any part other than the picture, such as creating a mask, or changing the size. If you do this, undefined results can occur. It is recommended that you do this on a backup of the software.