Amplitude spectrum of Audio file in iOS -


i new in ios development. part of developing ios app need fetch complete amplitude values of audio file , need process data without playing file (ie power per channel method not enough) . please guide me on audio file datas available in ios audio file duration, size ect..

if need process file on per-sample basis, using extaudiofileservices way go. read documentation details. can build code off of sample code provided apple.

the way think in case - converting input file output file, same sample rate, duration, format etc. , processing samples converted - in effect, processing file. can later delete input file if not required.

some pointers experience :-

  1. check file formats using supported (coreaudio doesn't give great error messages).
  2. make sure files using being copied app. can @ mytarget -> build phases -> copy bundle resources. can inspect files using software ifunbox.

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