[QUOTE=Ashley] You shouldn't have to preload anything just to hear audio.
Are you playing your game in the browser or via PhoneGap or appMobi? If you're just in the browser, it's very difficult to get audio to play at all on iOS: the browser blocks all HTML5 audio unless initiated by a user-input action. That's why pressing a button on the w3schools site plays the audio, but a collision event or something else won't play the sound. On top of that I think in the browser it can only play one sound at a time.
I've recently just picked up Construct 2 and I've made some small projects to test out its features. It all seems good so far apart from the lack of audio when playing through Safari on the iPads (tested on iPad 1[5.0.1], iPad 2[5.0.1] & iPad 3 [5.1])
I initially started out with a backing music track and a simple sound effect. I've since removed the music track to see if it was able to play the sound effect by itself, but I've still had no luck.
The sound effect is told to play on a button On Clicked event, and the files are within the 'Sounds' folder (there is a .m4a, .ogg and .wav)
Does anyone have any ideas? Everything seems to work fine through Safari on the iMac. Cheers.