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Compressing Data with Audio

Mark Edwards

Hi,

Anyone know how to store data within an audio file?

I need to put together an audio CD that has embedded data in it that I can use to sync the embedded hardware to.

Any help or pointers appreciated.

Cheers

Mark

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  • 0 in reply to Mark Edwards

    Hi NG,

    Some information which is stored in the Subcode of a CD will be forwarded to the SPDIF output ("Digital Out" on some CD players). That true at least according to CD track start information, as you can see on some Dat recorders which can automatically get over the Start IDs while recording from CD.
    So you can get a signal up to every 4 seconds (minimum distance between start track signals)
    In addition, a CD contains indices (not many CD players display them). I don't know whether they appear on the SPDIF output.
    To put SPDIF signals in your embedded hardware, use a special receiver IC (e. g. Crystal's 8212 or 8202, AFAIK after a few years).

    Much success - Peter

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  • 0 in reply to Mark Edwards

    Hi NG,

    Some information which is stored in the Subcode of a CD will be forwarded to the SPDIF output ("Digital Out" on some CD players). That true at least according to CD track start information, as you can see on some Dat recorders which can automatically get over the Start IDs while recording from CD.
    So you can get a signal up to every 4 seconds (minimum distance between start track signals)
    In addition, a CD contains indices (not many CD players display them). I don't know whether they appear on the SPDIF output.
    To put SPDIF signals in your embedded hardware, use a special receiver IC (e. g. Crystal's 8212 or 8202, AFAIK after a few years).

    Much success - Peter

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