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Bluetooth Audio Codecs

Discussion in 'Model 3: User Interface' started by eli_, May 20, 2018.

  1. eli_

    eli_ Member

    Joined:
    May 14, 2018
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    Location:
    Bellevue, WA
    I was curious what audio codecs are supported on the Model 3 for Bluetooth media streaming since the quality actually seemed pretty good. I thought I'd share my findings for folks who are also interested. From past threads, it looks like the support is the same as the Model S and X.

    I logged the Bluetooth traffic as the phone and car negotiate what codec to use and determined that the car supports the baseline SBC and also AAC (both MPEG2 and MPEG4) at every conceivable sampling rate. It does NOT support Qualcomm's proprietary aptX codec. When paired to the Model 3, an iPhone chooses the following codec for Bluetooth streaming: MPEG2 AAC LC Stereo, 44.1khz, variable bitrate @ 256kbps peak

    More detailed logs of audio capabilities are here: https://pastebin.com/raw/iNSzfTzs
     
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  2. Lycanthrope

    Lycanthrope Supporting Member

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    Brussels
    One of the missing codecs on Model S&X for USB devices is ALAC, which I always found strange as it’s open-source these days. Is the M3 able to play-back Apple Lossless?
     
  3. eli_

    eli_ Member

    Joined:
    May 14, 2018
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    Location:
    Bellevue, WA
    No luck! It wouldn't play ALAC files on my USB drive, but FLAC works okay.
     

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