Paul: Thanks, we think so too!

Thomas Landgraeber, Tom Meade: Thanks for the kind words - tell your friends!

Red: We don't have anything to announce there right now, but it's certainly something we'll consider.

Fazal Majid: We'll certainly consider sample rate adjustment for a future version.

Ryan, Bojan: As with all of our software, the free trial is identical to the full version. Unfortunately, the issue here is MacOS itself. AirPlay devices don't appear (on the system) as audio devices until they're actually selected. Prior to that, they're entirely hidden, and the Sound SysPref is doing something very hacky to show this as if they were real audio devices. If you open up Audio MIDI Setup, for instance, and you’ll see that they’re not present there either.

We’ll be considering ways we might improve things in the future, but we'll have to see what's even possible.

Paul W: Soft play-thru means hearing, through your specified output, the audio that's coming in via a microphone or other input. By default, mic audio is not played through the system, but with SoundSource's Play-Thru window, it is.

As far as what you're looking to accomplish, you should have a look at Loopback: https://rogueamoeba.com/loopback. With Loopback, you can route audio between apps.