Chart sound override command

Does anyone know the command that will turn all the sounds on/off on a chart and override the settings of the individual indicators?

I've added a button to the chart toolbar and would like to be able to use it to turn off the sounds on the chart that I'm not currently using with a single click, rather than have to open each chart and turn off the sounds of each individual indicator.

Many thanks.

PS. I know it's possible as I've seen it done on some commercially available Ninja indicator charts!