A free analyzer/signal generator plugin to analyse the frequency and phase responses of any plugin (or hardware).
This plugin started as a developer tool but has been simplified so that it doesn't require a complicated setup to work. Just sandwich the effect(s) you want to analyse between TWO instances, the first one set as the signal generator and the second one as the analyzer. Then set the latency if needed, That's it!
It's particularly useful as a learning tool to see what classic EQs are doing for example.