zgmg Posted July 1, 2013 Share Posted July 1, 2013 Logic can work with mp3's but automatically converts m4a's into AIFF? Does anyone understand why it wouldn't both be mp3/m4a or AIFF? The other thing is that I noticed though the file extension reads .aif, if you Get Info via Finder (Apple-I), under the Kind metadata, it reads AIFF-C audio. AIFF-C appears to be compressed audio - is that inferior to AIFF (no -C) or is this a wrapper that has nothing to do with quality/fidelity - analogous of AAC files wrapped in a m4a extension...? Thank you. Link to comment Share on other sites More sharing options...
fastfourier Posted July 1, 2013 Share Posted July 1, 2013 Traditionally, Logic converted all compressed formats into PCM (AIFF/WAV) when you import them. Logic works with PCM audio natively and the idea was (I assume) that you would save CPU cycles by not having to convert your MP3 on the fly. I guess that now computers are powerful enough that decompressing MP3s is a trivial task, so it doesn't bother converting the file over to PCM. I don't know why it isn't the same for m4a though. AIFF-C can contain a a number of different formats, so yes, it's basically a container. The ones that Logic creates probably contain just straight uncompressed data. You can find out what's in there using the afinfo command line tool. Link to comment Share on other sites More sharing options...
Eric Cardenas Posted July 1, 2013 Share Posted July 1, 2013 Logic will not automatically convert the mp3/aac files if they are created in Logic, iTunes or other applications using QuickTime/AV Kit. AIFF-C does not mean it has to be comprised. It uses this filetype to be able to embed additional meta data. Link to comment Share on other sites More sharing options...
zgmg Posted July 1, 2013 Author Share Posted July 1, 2013 Great, thank you both!! And as I'm using Logic 9 with Pro Tools, is the only real difference in terms of recording and converting files in AIFF versus WAV taste? Link to comment Share on other sites More sharing options...
Eric Cardenas Posted July 1, 2013 Share Posted July 1, 2013 You're welcome. AIFF and WAV contains the same PCM file so they will at least sound the same. Link to comment Share on other sites More sharing options...
zgmg Posted July 2, 2013 Author Share Posted July 2, 2013 Thanks EricBradley! Link to comment Share on other sites More sharing options...
Eric Cardenas Posted July 2, 2013 Share Posted July 2, 2013 Anytime! Link to comment Share on other sites More sharing options...
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