ADAU1442 SPDIF Lock Bit

Hi,

When connecting a SPDIF Signal to the ADAU1442 the first time after power on there is a nasty click.

Question: Is it possible to access the SPDIF Lock Bit ( Reg 0xE0C9) from inside the ADAU1442 program to trigger a delayed UnMute ?

Bernd

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    •  Analog Employees 
    on Jun 19, 2013 7:01 PM

    Hi Bernd,

    I assume you are routing the S/PDIF input signal through the ASRCs, since external S/PDIF sources are generally asynchronous to the DSP.

    I think this pop noise is from the ASRCs themselves, as they automatically detect the incoming sample rate. In that case, you could use either the S/PDIF lock bit or the corresponding ASRC lock bit to trigger the delayed un-mute.

    I hope that helps.

    Thanks,
    Brett

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  • 0
    •  Analog Employees 
    on Jun 19, 2013 7:01 PM

    Hi Bernd,

    I assume you are routing the S/PDIF input signal through the ASRCs, since external S/PDIF sources are generally asynchronous to the DSP.

    I think this pop noise is from the ASRCs themselves, as they automatically detect the incoming sample rate. In that case, you could use either the S/PDIF lock bit or the corresponding ASRC lock bit to trigger the delayed un-mute.

    I hope that helps.

    Thanks,
    Brett

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