How do I create simple button volume controls?

I am trying to connect a global variable to the master volume. What am I missing?

You seem to be missing the action:

Audio set master volume = Volume

It looks like you need an action to set the audio volume from the variable. Volume is in decibels so you could convert a value 0-100 to decibels with this:

LittleStain

9252015 Fixed the Volume Control had to set system active then set master volume to global variable volume.

rojohound

I like having options, but where would I put the formula? Do I use a function to set it up or and array?

-log10(100/x)*33.2

(with 33.2 is 10*log2(10))

x is percent between (0,100]