How to trim audio file in iPhone?

问题:

I have sound files in my document directory folder and i want to trim that sound file.
How to do that?

回答1:

you can use Extended Audio File Services. have a look at the reference for ExtAudioFileRead & ExtAudioFileWrite (they have sample code) then you can open one audio file read it, trim it and then write the new one.go here http://developer.apple.com/library/ios/#documentation/MusicAudio/Reference/ExtendedAudioFileServicesReference/Reference/reference.html

回答2:

What do you mean by trim ? You want to get chunk for aduio of specific duration from with in main Audio file ?

might be this post could help Serialize Audi File Objective C