I logged this as an feature request (#741), but maybe this forum is more appropriate, so there can be discussion etc.
I am looking for a way to change the parameters of a plugin via the command line. Specifically, the speed-pitch plugin.
What I have in mind is something like this:
audtool plugin-parameter speed-pitch speed 1.15
audtool plugin-parameter speed-pitch pitch 0.891
When ran, the speed setting for speed-pitch is updated and, if the plugin is enabled, then it has immediate effect.