I need something similar to WM8805 (S/PDIF receiver - Wolfson), but with the jitter suppression beginning at 10 Hz or less.
Thank you, Pawel
We do not have any standalone S/PDIF receivers available, but there are some products with S/PDIF receivers and sample rate converters integrated. One example is the ADAU1445 SigmaDSP with integrated S/PDIF receiver and transmitter.
I came across this thread when searching for exactly what the original poster is looking for.
Can the ADAU1445 (or any other) dsp just "pass through" the spdif stream without any processing ? And while doing that is it possible to buffer (fifo) or slow pll it in such a way that the jitter in the incoming spdif stream is filtered down to say 50hz or lower ?
If you know of any other products that are capable of doing this please do advise.
This should be possible, by setting the DSP of the ADAU1445 to take its start pulse from the S/PDIF receiver.
Here's a visual tutorial of how to set up the project to do that:
Project file is attached.
Hi Brett, thanks much for your response. I will download SigmaStuidio and check out the proj file.
In the datasheet I see that it can also output an I2S stream(see attached screen shot below). Is it possible to accomplish the same thing (dejitter and passthru) with the I2S output ? Or this is possible with spdif only since it passes through the DSP core ?
Also, I didn’t quite follow what part of all this would actually allow the control of the dejitter corner frequency i.e. set it such that it can dejitter down to 500hz or 50hz or lower ?
Thanks for all your help!
Yes, this other path (I believe it is called the Auxiliary Output path) will do the same thing. Unfortunately, the parameters of the dejitter circuit are fixed and not programmable.
By the way, there are some other products from Analog Devices that might suit your needs. Please check these links for the product descriptions:
ADAV801: Audio Codec for Recordable DVD
ADAV803: Audio Codec for Recordable DVD
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