User Profile

I know a similar question was asked here...(https://forums.developer.apple.com/thread/27681)...but it doesnt give an example of how to do it which is what I am after as I can't work it out from the information provided.I am trying to work out how I can change the volume of an SCNAudioPlayer in real time.Currently, I have an SCNAudioSource connected to an SCNAudioPlayer. This audio player is then assigned to a SCNNode so that my sound makes use of SceneKits spatial audio processing.As it stands, I am able to change the volume of each SCNNode using SCNAudioSource.volumetriggered by the boolean variable vol. An extract of my code for this is shown below:(audioSource, audioCount) = soundFileSelect(audioFileIndex: 0) audioSource?.isPositional = true if vol { audioSource?.volume = 1.0 } else { audioSource?.volume = 0.0 } let audioPlayer = SCNAudioPlayer(source: audioSource!) geometryNode.addAudioPlayer(audioPlayer) let play = SCNAction.playAudio(audioSource!, waitForCompletion: true) let loopPlay = SCNAction.repeatForever(play) geometryNode.runAction(loopPlay)However, this only changes the default volume setting of the audio source, and so only happens when the node is spawned. I am trying to change the volume of it in real time, after a button press.I feel I am missing something very simple, and have trolled the internet for documentation and examples but am really struggling. From Apple's API documentation I am fairly certain it can be done. As far as I can tell you have to use the audioNode property associated with the SCNAudioPlayer which forms part of the AVAudioMixing protocol. Using this AVAudioMxing volume property should be what I need!However, for the life of me I can't work out how to implement this process in code within my current setup. I can access mainMixer.volume/outputvolume such as:audioPlayer.audioNode?.engine?.mainMixerNode.outputVolume=0but this doesn't seem to have any effect.How do the AV and SCN components link together?Any help or examples of how one goes about implementing this would be hugely appreciated!Thanks in advanced.