I need a simple module that print wave of iPod song (MP3) on iOS4.0
You can do this easily with AVAssetReader on iOS4.1 or higher.
But I need this function on iOS4.0, which does not support AVAssetReader.
One way I tried was converting MP3 into MP4 with AvAssetExportSession, but failed on iOS4.0
This should be done on iOS4.0 according to Apple document. But failed. I don't know why.