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Author Topic: Problems with m4a lossless  (Read 1851 times)

LeoH

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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.
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JimH

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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?
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LeoH

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Re: Problems with m4a lossless
« Reply #2 on: May 28, 2012, 06:50:47 pm »

File Types option for AAC is set to automatic.
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LeoH

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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. 
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maciekb

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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.
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