Reddit reviews Optical to Coaxial or Coaxial to Optical Digital Audio Converter,Musou Bi-Directional Digital Coaxial to/from SPDIF Optical (Toslink) Audio Signal Adapter Repeater Splitter
We found 2 Reddit comments about Optical to Coaxial or Coaxial to Optical Digital Audio Converter,Musou Bi-Directional Digital Coaxial to/from SPDIF Optical (Toslink) Audio Signal Adapter Repeater Splitter. Here are the top ones, ranked by their Reddit score.
Converts Toslink Optical or Coaxial audio signal to both coaxial signal and toslink signalBi-directional audio switch to select coax input or toslink optical input based on your audio signal source.Coaxial or fiber can be used as a signal source for reverse conversionSupports sampling rate highest up to 192 KHz,support LPCM2.0/ DTS/ DOLBY-AC3Power by USB cable,easy to install and simple to operate,no need any software and driveNoise-free transmission,Compatible with Blu-ray Player, Satellite receiver, BR player, Xbox 360, HDTV, DVD, Amplifier, Sound Bar, Speaker and all device with digital audio out port
The 3.5mm output on the Chromecast Audio also doubles as a mini Toslink (digital optical) output. You are probably more familiar with the regular size Toslink digital output that is more common. Here is an adapter that takes you from mini Toslink to Toslink.
If your DAC only accepts a Coax digital input, though, you will need to take that a step further with something like this that converts from Toslink to Coax.
I have not used either of these products, specifically, and therefore cannot attest to their quality or performance. You may want to research their quality and/or consider similar alternatives from other manufactures. I just wanted to provide you with some examples.
Personally, I use just CCA with 3.5mm to RCA analog output right into my amp, and find its internal DAC decent enough for my purposes.
This converter should work fine for you. It's convenient because it can be USB powered and most TV sets have USB connectors for that purpose.