Very basic question regarding the volume slider values if I may please?
0 up to 15 I do understand, however 0 down to -15, what does that mean in the Controller?
Best answer by James L.
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Userlevel 7
+21
What operating system are you referring to? Mac Windows or mobile?
The settings slider on the app
PLEASE be more specific. Maybe you could post a screenshot?
+17
I think
Positive values (0 → 15) increase the amount of sound that come from that product and negative values (-15 → 0) decrease the amount of sound that comes from that product.
Increase it if you want your sub/surrounds to be louder, decrease if it’s too much 
Thanks James,
I get that but why the negative values, that’s my point. If you want to decrease volume surely 15 down to zero works to reduce decibel levels but why negative values from -15 up to zero?
Thanks James,
I get that but why the negative values, that’s my point. If you want to decrease volume surely 15 down to zero works to reduce decibel levels but why negative values from -15 up to zero?
Because 0 is the norm. positive values are above the norm, negative below.
0 is the neutral, default setting. You can boost or reduce from that according to preference.
+17
I get that but why the negative values, that’s my point. If you want to decrease volume surely 15 down to zero works to reduce decibel levels but why negative values from -15 up to zero?
The rationale behind that is that 0 is the middle point; the default. If you want more than that, increase above 0, if you want less, you go below 0. These settings were implemented long before I started working here, so I can’t comment on the exact design choices, but I’m almost positive we’re not the only one doing things this way 
It’s quite common to use negative values in audio production as well as some home audio products.
Edit: Looks like I was too slow typing my response! Thanks jgatie and nik9669a 
Thank you for explaining that one to me nik; I get it now: -1 is one increment quieter than neutral/default and +2 is three increments louder than that, ( or two increments older than default/neutral).
My old amp simply went 1 up to 10
The answers above have made me think of another question:
Because the Sub relieves the Arc of doing the lower frequency work, does that mean that I should set the Arc bass value to-15 or does it mean that the Sub needs an optimal Arc setting to do what it does best?
The Sonos system adjust those settings for you, depending on whether or not you have a Sub bonded. When you add a Sub, there’s no need to adjust the settings, unless you feel like you need to, when hearing the system. It’s all relative to your ears, and your expectations, there’s no need to adjust the settings when you add a new device, unless your ears tell you you need to.
My old amp simply went 1 up to 10
Spinal Tap had amps with volume going up to 11; think what volume you can get now that you have one going to 15!!! 😜
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