I’m developing an ARKit application where I aim to attach procedurally generated audio to detected planes in the environment. While using a static audio file with SCNAudioSource and SCNAudioPlayer works as expected, integrating procedural audio via AVAudioSourceNode does not produce any sound, nor does it generate any error messages: Stack Overflow Post
Working Implementation with Static Audio File:
let audioPlayer = SCNAudioPlayer(source: audioSource)
node.addAudioPlayer(audioPlayer)
Attempted Implementation with Procedural Audio:
// Audio generation code
}
let audioPlayer = SCNAudioPlayer(avAudioNode: audioNode)
node.addAudioPlayer(audioPlayer)
In this setup, the AVAudioSourceNode successfully generates audio when connected directly to an AVAudioEngine. However, when used with SCNAudioPlayer and attached to an SCNNode, it fails to produce sound. What doesn’t work is creating some procedural audio with an AVAudioNode, as documented here:
Apple docs
Additionally, I explored the WWDC18 AR game project, SwiftShot, which utilizes SCNAudioPlayer(avAudioNode:). After updating it for the latest Xcode, the graphics function correctly, but the audio does not play. I also noted that the Apple documentation mentions an audioPlayerWithAVAudioNode: method, stating:
Using this initializer is typically not necessary. Instead, call the audioPlayerWithAVAudioNode: method, which returns a cached audio player object if one for the specified AVAudioNode object has already been created and is available for use.
However, this method does not appear to be available in Swift. Any insights or guidance on this matter would be greatly appreciated.
