Hi yes.
-Have an audio track with an audio event present, unmuted.
-If you duplicate this to a new TrackVersion and mute the event or create a NewTrackVersion so that there is no longer any event - the one in the previous TrackVersion remains unmuted but you will not hear it.
1.)Back to just having an audio event present on a track, unmuted.
2.)Apply Spectralayers to event
3.)Duplicate TrackVersion and bounce the event and mute it, or, just create a New TrackVersion so the track is now empty.
-You will still hear Spectralayers playing on the previous TrackVersion in Step 2 before you created/duplicated NewTrackVersion.