Feature Request - Ability to control volume from web interface

[ChainmailBuddha]

Sometimes I have the ability to plug my Pi into a sound system at a venue, but I do not always have control over the volume of that system. It would be nice to be able to control the volume of either the Pi, or just JM from the web interface instead of having to remote into the Rasbpi to do so.

[TheMiniBar]

Yes this would be handy. An admin option for Volume along side “Force All Start” and “Team Sizes” would be great.