I'm looking to feed I2S from HDMI audio or specifically the ARC port of newer televisions to a Twisted Pear B3pro. After looking around a while I realized there's nothing out there (that I could find) diy wise that could do it. So I knew there were plenty of audio extractor boxes, most of them were toslink. If I was going to compromise I would use coax spdif out from one of these boxes. I had one of these from Amazon basics that cost $20 and it did the job well feeding my receiver for a few years. I decided to take the cover off and see what was inside
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I looked up the chip inside and found out that it is made by this company
https://www.semiconn.com/ep92a3e
The cool thing is that is has I2S output but I could not locate a data sheet to see what and where those pins might be. I've sent an email to that company to see if they'll send me one. If someone knows where to find it please post it.
What's even better is this set of pads labeled JR1 has the right amount of pads for I2S. Could this be I2S? The unit in question is here
https://www.amazon.com/AmazonBasics-Audio-Stereo-Extractor-Converter/dp/B07KRWYN4R/ref=sr_1_1_sspa?crid=1CD2F4FRBU141&keywords=hdmi+audio+extractor&qid=1661568784&sprefix=hdmi+audio+extractor,aps,117&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFRSFkyS0NVMUdXODYmZW5jcnlwdGVkSWQ9QTA2ODc1OTIyQ0pZM0UyVlNUR1I0JmVuY3J5cHRlZEFkSWQ9QTA0MjczMDMyUUFISE82S0UxVjZSJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==
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I don't have the knowledge or tools to try and figure out what JR1 is. Does anyone have a schematic of this unit? I would think it's mass produced under several makers and models.
Any thoughts? Help?
