iTunes Digital Optical Out.

Discussion in 'Digital Audio' started by Logengrin03, Apr 7, 2014.

  1. Logengrin03 macrumors newbie

    Apr 7, 2014
    I download 96K audio files using HDTracks and other sources. Using iTunes, is it possible to output hi-resolutuion audio files (96k) via the optical audio out on my mac? There seems to be mixed opinions. If I set my sample rate in audio settings (globally) to 96K, my Denon 5700 recognizes the 96K sample rate because that is what the clock is set at. Even if I play a file in iTunes that I know is standard CD 44.1K, my Denon still recognizes the 96K signal since that's what the clock is set at. But, if I play an AIFF file at 96K, does it output that file over optical at 96K or is it down-sampled? I know iTunes down-samples to 44.1 over AirPlay but I do not know how it behaves over the direct optical out. Anyone know?
  2. ChrisA macrumors G4

    Jan 5, 2006
    Redondo Beach, California
    If you can't hear the difference does it matter?

    That said. I Max OS X cn play "real" 96K audio via my Presonus audio interface. So it does to always downsample. What it does for the built-in audio interface might depend on which Mac you have. I think it only downsample in the cases where the interface can't handle the higher bit rate. If you can set your interface to 96K that is a good sign.

    The only way to prove it is with some test equipment and test files.

    I use 96k 24-bit for recording because I know I want to process the heck out of the data which can introduce noise. The final produce is typically 48K 16-bit for video.

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