This is a good question. I came across this too. I would like to press the command key twice and have the microphone activated immediately. Did anyone find a solution to this? I don't like using the "Siri" voice command, because a million apple devices around me try to respond or kick my Mac Studio out (like the HomePod thinks it should be responding to requests because it can hear me in the same room). Rather just use the command key on my Macs and have the mic open. There might be a sysctl hack in the command line somewhere?
