This has been mentioned before, but this doesn’t work in my car (Nissan) via BT. The volume is global.
”SIRI, set volume to 50%”
will result in Media Volume and the global volume (including the side up/down controls) being set to 50%
”SIRI, set SIRI volume to 75%”
will result in SIRI’s voice being set to 75%, but this only seems to impact SIRI responses and not Map navigation.
You also get the current absolute volume settings from SIRI:
”SIRI, what is the current volume?” or “SIRI, what is the current SIRI volume?”
On some drives the music and nav volume are more relative to each other. I am still not 100% if this is due to my car’s speed sensitivity volume setting or the individual tracks loudness.
This shouldn’t be so messed up.