WIP - Dj monitor

[ryanramage]

** dont merge ** experimental

A way for each setup to output to different devices allowing for a monitor channel and a master output, and maybe crossfading.

Play around with. feedback and improvements welcome.

Known issues:

• Switching between outputs skews the time. seems fine when you switch it back though.
• gets laggy

[ryanramage]

Fyi can select a different output channel at the bottom of the setup.

[mmckegg]

Hey! I've been giving this some thought.

I'm thinking that a nice way to implement this would be as a global controller "External Output" and some additional routing options.

I recently added "External Input" and various Sync Out global controllers, so this would fit in well. I'm imagining you would add your output device to the project and then it would appear as an output destination option on each chunk in the setup.

Oh, I suppose that you could have a master output option like you have in your PR, but rather than just listing all output devices, it would only list the ones you have setup for the project. Potentially this would also make it a lot easier to take all of the things that output to one output device and quickly switch them to another.