i've got the rears installed now and connected up.
i've set the distances for each speaker.
you say set the main volume at listening level - however the level is different for each source i've found. watching TV is around 17-18, but movies we'd have it cranked up higher than that. and watching normal stuff on plex it might be somewhere in between (depending on the audio source).
I setup initially watching a 4k disk and this is probably lower volume than I would use with netflix. But I'd you set all levels up a volume you are comfortable with for front speaker it will be balanced. Eg db volume is relative for all speakers.
is there a particular phone app to choose? i'm on android.
however, surely a phone recording like this won't give good results as the microphone is one directional, so it'll hear stuff it's pointing towards better than stuff that it isn't pointing at? skewing the results?
you say ability to boost sub and rear? i won't be one for manually adjusting levels on certain speakers. it'll be one master volume on the remote (logitech harmony).