Hello Jlaudon,
in generall i recommend that you use the mixer channel volume of your host to control the global volume of plugins. It's a global parameter and affects all presets of a synth.
It's already possible to assign Master Volume globally to all presets in Gladiator v.2.2 with Midi learn:
PC: Shift + strg/control + left mousebutton on a knob activates Midi learn mode. If Midi learn is activated the next incoming Midi controler command is assigned to the knob. The Midi learn configuration of all controlers is stored in an automatically generated file 'gladiatormidi.cfg' within the vst directory. If 'gladiatormidi.cfg' is deleted it automatically resets to the default assignments.
Mac: Shift + Apple + left mousebutton on a knob activates Midi learn mode. If Midi learn is activated the next incoming Midi controler command is assigned to the knob. The Midi learn configuration of all controlers is stored in an automatically generated file 'Library/Audio/Plugins/gladiatormidi.cfg'. If 'gladiatormidi.cfg' is deleted it automatically resets to the default assignments.
Reseting midi learn: The midi learn configuration is stored in Gladiatormidi.cfg (plugin folder). You can reset all midi CC assignments by deleting this file.
We'll examine if we can support 'Master-volume-to-0' in the next update.
Best Regards,
Markus Feil