I found https://audiophilesoft.ru/articles/realtek_audio_setup/ALC887.pdf
In the pdf file, refer to pages 64, 67, 71, and 72. I don't understand it well, but it doesn't say whether clock signals are emitted when there is no audio signal.

On Fri, Aug 9, 2019 at 11:18 AM Chris Caudle <chris@chriscaudle.org> wrote:
On Thu, August 8, 2019 6:39 pm, crocket wrote:
> If there is no audio data from SPDIF out, would SPDIF out still send clock
> signals?

Often that is the case, but you would have to consult the documentation
for your particular audio interface to verify.

--
Chris Caudle


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