cut audio file with iPhone SDK

Is it possible to cut audio file with iPhone SDK? (file has .caf extension) I just need to cut off the silence at the beginning.

(Also, maybe it's possible to write new file from the existing one with specified start and end time.)

开发者_Go百科

Thanks in advance!

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Its not hard, its just fiddly, 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.

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There is no trim function. You have to write some code that opens a file for reading and creates and opens another file for writing. Then write a loop that reads the audio sample or packet data, discards the silence at the beginning, and writes the audio data to the output file.