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Does Bluetopia support CSR aptX codec?

tri dinh
Intellectual 300 points

Other Parts Discussed in Thread: WL1835MOD

Dear Ti Expert!

I just tried Bluetopia stack source mode on WL1835MOD Cape with Beat's Pill Speaker but it unknown the codec type of Beat speaker, I discovered that Beat used CSR bluetooth chipset and aptX codec(not SBC) and only Android and IOS support this stream type. so I want to ask does Bluetopia support CSR aptX codec?

What's solution to stream audio to Beat speaker if Bluetopia really don't support aptX?

Thanks and Regards,

Tri.

  • 0
    TI__Mastermind 32615 points
    Hi,

    No bluetopia stack does not support apt-X.
    The BT A2DP Specification specify that the only mandatory codec is SBC. MP3, AAC and ATRAC are also specified in A2DP, but are optional. Apt-X is not in the A2DP spec at all (but A2DP supports custom codecs).
  • 0 in reply to Sundeep Javvaji
    Intellectual 300 points
    Dear Sundeep!

    Could you advise more detail about how I can develop the apt-X custom codec in Bluetopia stack (LinuxAUDM)?
    Where I can get the source code of apt-X codec for Linux? Have any license fee when we inplement apt-X codec in our Bluetooh Bluetopia stack?

    Thanks and Regards,
    Tri.
  • 0 in reply to tri dinh
    TI__Guru* 85400 points
    Hi Tri,

    Sorry for the late response.
    AFAIK, Apt-X is a vendor specific codec and not in BT spec. Hence, I can't comment on anything about Apt-X.

    For having any custom codec on the Bluetopia stack, you would need to use the GAVD APIs - but it will be complex.

    Anyway, FYI, the AUD library supports SBC, MP3, and AAC, which are all A2DP codecs.

    Regards,
    Gigi Joseph.