Cable help for Mac Mini and TV into a DAC..

I suppose there's also an option 1.1 where I take the optical out from Sony...and to make it coaxial input into Modius, I first use a "optical to coaxial converter". 

https://www.amazon.ca/LiNKFOR-Digital-Converter-Bi-Directional-Splitter/dp/B07QTP7FX5/

This way:

Sony optical out -->  optical input into this device --> coaxial output cable --> goes into coaxial input into Modius 

Is this correct? 

Of course there's a whole different scenario... where I totally ignore Modius and just get a new stereo receiver like Cambridge Audio AXR100. Will this hurt sound quality? 

In my office I use a Benchmark DAC3B and it's 2 Toslink inputs for my TV audio and computer audio. I also stream to this DAC via USB. The 2 Toslink inputs sound excellent. If you want to save some cash look for a used BM DAC2 (under $1k) which sounds like the DAC3B. I have had both.

The  Cambridge Audio AXR100 seems to offer 2 Toslink but it also seems like a bit of a noisy unit.

All those conversions you are considering, with a unit likely having a low quality power supply, does not give me confidence that digital nasties (noise, jitter, etc) won't makes it's way into your DAC.

Here is something that I used 10 years ago to add 3 Toslinks into a DAC with 1 Toslink input. It does not need a power supply.

Amazon.com: Nyrius SW100 Digital Audio Optical Toslink 3 Input Selector Switch Compatible with Fiber Optic Cables, HDTV, Blu-ray DVD player, PCM, Dolby Digital, DTS, XBOX360, PS3: Home Audio & Theater

I have this lying around in the house somewhere. It worked rather well when I was using it.

Super, thank you so much!