WOW. I had no idea. It is working AWESOME on the latest macOS Catalina. I plan to show it in class at Berklee this week. But, there is something that you might be able to help with - or offer some advice - or is possibly a bug.
When I export an effect - like StuckBuffer or pvsBlur or bounceDelay or … to a StandAlone App, by default when one opens the “app” version a warning appears that the built-in mic is turned off to prevent a feedback loop and a little settings button appears.
Problem is… you can’t turn on the built-in mic.
- if it is selected
- if the audio is unmuted
no input.
I will try with an audio interface in a bit, but maybe there is an option that let’s me build with the internal mic on - or… a way to save and reload the state with the mic on?
Just tested on another Mac laptop - running Mojave.
- and set the app to use the Apogee Duet Audio Interface
- and set the microphone to be a USB Mic
- and saved “bounceDelay” as a StandAloneApplication
Launches with Input Audio Muted
- unmute doesn’t matter or work
- choosing another audio input doesn’t work
Hope you can suggest a setting or fix or approach.
-dB
Hi Richard, I’m surprised you got this far with it
It’s quite a new feature, and relatively untested. I’m happy to give it a little love over the next few days and see if I can sort those issues.
It’s working fine for me here Richard. I suspect this is an issue with Catalina.
I’m hesitant to upgrade. Each time I upgrade my Mac I end up spending weeks trying to get things to run again. 
[edit] I have a few mac based jobs to do in the next week or so. I can’t chance upgrading until I have them completed. I’ll get back to you once I have upgraded 