Hey, I know it’s not an active thread anymore, but just for anyone who’s still interested: Runtime Audio Importer (https://www.fab.com/listings/66e0d72e-982f-4d9e-aaaf-13a1d22efad1) doesn’t rely on SetSoundAssetCompressionType or any other editor-specific functions, which is one of the reasons why it works consistently and the same way across different platforms, and both in packaged builds and in the editor.
Also, to stop the sound wave produced by RuntimeAudioImporter, there’s a separate function called StopPlayback, which can be called from the imported sound wave. Or if you pass the sound wave into an audio component, you can call the Stop function from the audio component itself to stop the sound playback.