Force play audio file through iPhone speakers?

Is it possible to force a audio file to play through the iPhone speakers even if headphones are p开发者_如何学Clugged in?

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See Audio Session Cookbook: Redirecting Output Audio. Briefly,

1. Set the category to kAudioSessionCategory_PlayAndRecord
2. Set kAudioSessionProperty_OverrideAudioRoute to kAudioSessionOverrideAudioRoute_Speaker

If that doesn't work, then there probably isn't a way to do it.

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Short answer No. Sorry. I tried to find something like this once but no luck. Apple is pretty vaige about this things.