I needed to play sequential audio files in a number of places so I made a package.

There are 2 inits, one takes filenames from your main bundle (like "karl.caf") and one takes URLs. Both throw errors. The filename init will error out if a file is not in your bundle.

public convenience init(filenames: [String]) throws public init(fileURLs: [URL]) throws

You can play any file, or play a random file. Upon the end of the file, the player will start the next file in the array.

public func play(index: Int = 0) public func playRandom()

And of course you can stop playback.

public func stop()

That's about it.