compressor : optimize graphics

[blaubär]

Situation : when nothing plays or there is a silent part in the track the compressor graphics shows the full sound level :

compressor-1.PNG (9.2 KiB) Viewed 1183 times

If a track is playing and there is no silence it shows the partial sound level :

compressor-2.PNG (9.19 KiB) Viewed 1183 times

Problem : that looks nice when nothing is playing or the track has no breaks, but if a track with silent passages is playing, let's say an audiobook, then the graphics are confusing, because they show the full sound level during the breaks.

Proposal : show zero sound level in the compressor when a track is playing without much volume.