void unloadSoundMarkerAndSyncedClips(SoundMarker marker, IEnumerable <SoundMarker> syncedMarkers)
        {
            SoundFile markerSF = marker.hotspot.soundFile;

            if (!markerSF.isDefaultSoundFile && (markerSF.loadState == LoadState.Success || markerSF.clip != null))
            {
                // Unload the first marker
                // marker.SetAudioPauseState(true);
                marker.OnDemandNullifyAudioClip();

                if (destroyImmediate)
                {
                    UnityEngine.GameObject.DestroyImmediate(markerSF.clip, allowDestroyingAssets: false);
                }
                else
                {
                    UnityEngine.GameObject.Destroy(markerSF.clip);
                }

                markerSF.clip      = null;
                markerSF.loadState = LoadState.NotLoaded;
            }

            // - - - - - - - - - - - - - - - - - - -
            // Unload Synced Markers
            if (syncedMarkers != null)
            {
                foreach (SoundMarker syncedMarker in syncedMarkers)
                {
                    SoundFile syncedSF = syncedMarker.hotspot.soundFile;

                    if (!syncedSF.isDefaultSoundFile && (syncedSF.loadState == LoadState.Success || syncedSF.clip != null))
                    {
                        // syncedMarker.SetAudioPauseState(true);
                        syncedMarker.OnDemandNullifyAudioClip();

                        if (destroyImmediate)
                        {
                            UnityEngine.GameObject.DestroyImmediate(syncedSF.clip, allowDestroyingAssets: false);
                        }
                        else
                        {
                            UnityEngine.GameObject.Destroy(syncedSF.clip);
                        }
                        syncedSF.clip      = null;
                        syncedSF.loadState = LoadState.NotLoaded;
                    }
                }
            }
            // - - - - - - - - - - - - - - - - - - -

            _managerDelegate?.OnDemandLoadingLoadedAudioClipsChanged(this);
        }