Hi @youknowslim OK I assumed you were in Logic Pro as well. Yes there is unfortunately an audio detection bug in the current version of Scaler 3 causing CPU spikes which is particularly prominent on Windows, but not as bad on Mac OS. This will be resolved in the upcoming 1.0.6 update.
Audio detection is possible in the standalone app, just make sure you have your audio input device configured, and disabled audio input mute, which is enabled by default to prevent feedback.
But if you are on Windows you may still be seeing the same CPU issue as when running as a plugin. You can use Windows’ task manager to confirm this, so you may be best to wait until 1.0.6 is released if you’re having trouble. Should be available later this week: