Dynastor

The threshold adjustment combined with an analyzer should win an award for the best compressor UI.

The upwards compression is hard to see in the analyzer, the contrast is too low.

Adjusting the mix setting has no visual effect on the analyzer.

The compress knob is quite confusing and has limited working range:

• 0-10% the compressor does not seem to be working at all.
• 60-100% seems to apply the same or very similar ratio for downwards compression.
• 100% downwards compression does not work as a hard limiter.

Some inspiration could be taken from "Spectral Compressor" by Robbert van der Helm, which is open sourced:

• The ratio adjustment provides better usability than the compress percentage used here.
• The upwards and downwards controls are separated.

Despite all the nitpicks, this is the most user friendly compressor for those who appreciate visual assistance.