So I've read through the manual several times now. Pretty good resource, obviously, but still doesn't address (that I saw) a couple of things.
1. Does dual zone have to be selected for the passenger passenger to control their own volume? Or is that just so she can select her own source?
2. I use the volume control on the left handlebar to change volume on the radio or media. 95% of the time it works correctly and shows me a number on the screen such as 10/17. Some of the time it will show 4/7 and not change the radio volume. As far as I can tell in the manual, the only thing on a 7 scale is the beep and ring volume - neither of which I have ever changed nor accessed since I've had the bike. Any ideas on why it's doing that? Anyone else have that happen?
Yes, you need to activate (turn on) Dual Zone, and your co-rider will be able to access and control all aspects of the system, independent of you. She/He can change sources/volume at will, and NOT interfere with the rider choices et all. Also she/he can access her/his phone as well, if it is connected (usually via the USB Port number 2, in the Tour Trunk. This is a very powerful feature of this bike...and of course, the bike's true value to the owner, is if he or she, takes the time to learn each and every tech/nuance of their ride. My wife loves being independent, and I probably now, could not buy EVER, another ride that did not have this feature at her station. She told me that now, she REALLY feels that she is part of the ride, and not merely being lugged around...(her words, lol). My wife takes calls, makes calls, we hold party line C.B. conversations with the Road Knights around us...and all of them, get freaked out, when I (for fun,) ask her not to say anything as I initiate a 'road traffic/construction' check conversation with an R.K....and then, about 2 minutes in...I say; "you know...my wife is also on this party line...and she speaks up...." The reaction is priceless, and we had on one occasion, a very good 50 miles interaction between the driver, his wife, myself, and my wife....they were into Harleys....but after my wife was talking directly to his wife, Carrie I think, was her name..but anyways, we told them that there was a Shell gas station coming up, and I only put in Shell Premium. They said, would we mind if they pulled in (room allotted) for his wife wanted to see our bike and have my wife show her this Dual Zone tech. Well, there was room (tight) for them, and they came over to the pump island...and while I was fueling, my wife and his wife were totally absorbed by my wife's description of use, and such. 20 minutes later...jeez....20 minutes later we were on our way, WITH THEM again...and another 75 miles was in a four way conversation (WE LOVE THE CB! and missed it on our 2008 Wing) with the result that they were going to go to a Yamaha dealer with their bike, and see what trade in figures could be had. The two most dominant features for Carrie, was her being independent of her husband, while riding...AND, she flipped when my wife told her about full heat coverage (they ride to the snowflakes as we do....) from her shoulders, down to her knees. Between the Dual Zone, and the heated co-rider backrest...Carrie was sold! I think her husband really was getting motivated by the obvious excitement in his wife's demeanor. He probably saw more miles...and the chance to get a new bike...and different bike (metric large bore V-Twin) with modern up-to-the-minute, tech. That was just one example of my wife's total adoption riding Charlotte, and it has made my ride time, so much better for myself. I can listen to the Stones...(not her favorite) as she flips about her easy listening jazz....gabs with her friends, takes some business calls (sneaking them in...) WE ARE GOOD! The miles aboard Charlotte, just melt away....the thrum of those beautiful twin mufflers, keeping back beat to the Stone's 'Satisfaction'....within my helmet...
Post Edit, you need to think of the volume menu's as the different channels of a mixing board. The left hand volume is the MASTER VOLUME but the 'board' menu will maintain any of your choices. You have to remember, the sound system was the child of Yamaha Music...and they manufacture and sell professional mixing boards...so they came into the design from a total music engineering stance. I use mixing boards all the time, so saw this right off...and when realizing what they did...it was a snap to configure the bike to my/her needs and now the Master Volume does its thing...
You need to master this...and then it will all make sense to you and your wife/partner
Have your wife/partner learn the ropes...to get what you paid for...!