If you are feeling adventurous, you can make Sound Control work Mojave just like it does on High Sierra by doing the following:
1. Disabling System Integrity Protection
Please do not disable System Integrity Protection unless you know what you are doing.
2. Removing /Library/Audio/PlugIns/HAL/STZAudioBridge.driver
All of Sound Control's features will work just like they do on High Sierra, including audio routing.