zwabo https://github.com/moddevices/max-gen-plugins
1 Pedalboard using it

Zinvert_phase

Plugin screenshot
Utility

Simple phase inverter. i.e. useful on stage for acoustic instrument amplification

Control Default Min Max
INVERT 0.00 0.00 1.00
urn:maxgen:zwabo:zinvert_phase v.1:0.0-3