swift - Splitting Audio Channels iOS -

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i've been working on ios project attempting split audio file each individual channel can played separately. right opening audio file , copying data avaudiopcmbuffer separate data.

right testing on mp3 file , far when copy audio data buffer of buffer's contents initialized 0. supposed happening?

    let fileurl = nsurl(string: path!)     let audiofile = try! avaudiofile(forreading: fileurl!)     let framecount = uint32(audiofile.length)      let buffer = avaudiopcmbuffer(pcmformat: audiofile.processingformat, framecapacity: framecount)      {         try audiofile.readintobuffer(buffer, framecount: framecount)     } catch {         print("no data")     }

i still new working ios , know may going wrong, appreciate help.

the values returned in buffer small. if round them zero.

to see if it's working correctly, multiply them large integer.


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