Make SPDIF (RCA) to aux cable

[bandar]

Hello Audio pros


TV Out port is SPDIF. Speaker In is 3.5 aux. Exact name of cable I need is "XiaoMi SPDIF Digital Coaxial Audio Cable 3.5mm" . PIC:

Out of stock here. Got to DIY one.

I Can't find about the connections that have to be made. Tried google / youtube. AFAIK the SPDIF is digital and aux is analog. So this cable converts digital to analog ?
AFAIK RCA should have 2 points - ground and the data one. DO I split the data one into 3 and solder to all there parts of the aux jack ? Or something else ?

Thanks.


Edit: Updated Picture

 

[Old'n'Cranky]

yeah no your right.
Such a cable would be a unicorn.

As you say, spdif is a digital signal, Aux would be an analogue signal.
So you'd need a spdif to analogue converter.

Millions of them about.
Have a look at your local electronics or audio stores, ebay etc will have bazillions of them.

 

[bandar]

But there are lots of listings of such cables:
Buy Xiaomi Spdif and get free shipping on AliExpress.com
https://www.amazon.com/Coaxial-Digital-Audio-Cable-Player/dp/B01KTTJR0A

what could they be doing ?

Edit: Don't know where my previous message went.

 

[DF96]

Maybe there is some weird device which uses a 3.5mm socket for SPDIF digital audio?

 

[bandar]

Is it possible there is slim convertor in the cable itself ?

 

[DF96]

Only if the cable has a power supply hidden in it too. Or perhaps the 3.5mm end is the TV box output, so it can supply some power to the hidden DAC.

I think you need to start again and make clear your requirements. The fact that you have found a cable which happens to have the right connectors on the end does not mean that the cable will do the job you need.

 

[MAAC0]

My old Sony VAIO AW laptop features an SPDIF out on the 3.5 Jack. Red light when You look inside the connector.
Perhaps they use the same approach...