Feature request- multi out in standalone app

[gorangrooves]

@Christoph-Hart It would be wonderful if we had multi-out support for standalone apps so that users with interfaces with multiple outputs could route our standalone apps.

One such practical use would be a VI drumset (e.g. one of mine) that could be used live as a standalone app with an e-drumset and have individual components go from an audio interface into a physical mixer for additional processing.

I've had inquiries for such functionality from customers/ potential customers.