Avaudioplayer Produces Lag Despite Preparetoplay() in Swift

AVAudioPlayer produces lag despite prepareToPlay() in Swift

I ran into this same problem and played the sound in the backgroundQueue.

This is a good example: https://stackoverflow.com/a/25070476/586204.

let qualityOfServiceClass = QOS_CLASS_BACKGROUND
let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
dispatch_async(backgroundQueue, {
    audioPlayer.play()
})

Slow start for AVAudioPlayer the first time a sound is played

The delay seems to be related to instantiating AVAudioPlayer for the first time. If I load any audio, run [audioPlayer prepareToPlay] and then immediately release it, the load times for all of my other audio is very close to imperceptible. So now I'm doing that in applicationDidFinishLaunching and everything else runs well.

I can't find anything about this in the docs, but it certainly seems to be the case.

Playing instance of AVAudioPlayer from background thread sometimes fails

There is no reason to say play on a background thread; playing a sound does not block the main thread. Moreover there is no reason to suppose that AVAudioPlayer is thread safe. And YOUR code is certainly not thread safe, as you are talking to the audio player simultaneously from different threads. So you’re using threads incorrectly. There’s no point discussing wrong behavior results. Take away your background thread and try your code doing things the right way. If there is still a problem we can talk about that.

Sound causing game to lag in swift sprite kit game?

You are getting lag because you are not preloading the sound files. You can preload them at App Launch, and then when you need just play them. For reference look into this stackoverflow's post

And if you still face the same issue then you can add sound in background queue, as demostrated here

let qualityOfServiceClass = QOS_CLASS_BACKGROUND
let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
dispatch_async(backgroundQueue, {
    audioPlayer.play()
})

AVAudioPlayer causes my game to lag

I figured it out. I used System Sound Services instead of AVAudioPlayer, and now it works perfectly.

This was very helpful: https://developer.apple.com/library/mac/documentation/AudioToolbox/Reference/SystemSoundServicesReference/index.html

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