INTERACT FORUM

Please login or register.

Login with username, password and session length
Advanced search  
Pages: [1]   Go Down

Author Topic: Problems with m4a lossless  (Read 1848 times)

LeoH

  • Regular Member
  • World Citizen
  • ***
  • Posts: 109
Problems with m4a lossless
« on: May 28, 2012, 06:32:06 pm »

I have been recording some vinyl using Pure Vinyl Recorder on a Mac and it outputs tracks in Apple lossless m4a format at 192k/24bit.  When tracks are copied into Media Center 17 on a Win7 PC, they appear and play properly.  The library shows them as 192k sample rate and 24 bits wide.  However, if I used the library tool in MC17 to convert to FLAC, bad things happen.  The FLAC converted files show up in the library as 192k / 16 bit and, indeed, the files are just 16 bits wide and commensurately smaller is file size.  Interestingly, the Media Editor program also sees the .m4a files as 192k/16bit.  Other programs, such as the Sony Sound Forge 10 app also sees the .m4a's as 16 bit, as well as a few other utilities I have (i.e., you are not alone).  I found one program called simply "Audio Transcoder" at www.audio-transcoder.com that does read the .m4a files at the correct sample rate and bit depth and does the FLAC conversion to the same.  I am naming name of programs because the problem is widespread and it might provide a clue.  Any ideas as to what is happening with file imports from Apple land? Thanks in advance.
Logged

JimH

  • Administrator
  • Citizen of the Universe
  • *****
  • Posts: 72438
  • Where did I put my teeth?
Re: Problems with m4a lossless
« Reply #1 on: May 28, 2012, 06:34:56 pm »

In MC options for Filetypes, is playback of m4a set to automatic or to Quicktime?
Logged

LeoH

  • Regular Member
  • World Citizen
  • ***
  • Posts: 109
Re: Problems with m4a lossless
« Reply #2 on: May 28, 2012, 06:50:47 pm »

File Types option for AAC is set to automatic.
Logged

LeoH

  • Regular Member
  • World Citizen
  • ***
  • Posts: 109
Re: Problems with m4a lossless
« Reply #3 on: May 31, 2012, 12:48:56 am »

Library Tools -> Convert Format will report failed when trying to convert a lossless m4a file to FLAC when MC options for File Types is set to anything but automatic. 
Logged

maciekb

  • Recent member
  • *
  • Posts: 25
Re: Problems with m4a lossless
« Reply #4 on: December 24, 2012, 07:03:40 pm »

I have the same problem, even with MC 18.0.103. 24bit ALAC files converted to FLAC has only 16bit depth.
Logged
Pages: [1]   Go Up