Looking for a small USB to TOSLINK/Optical converter

[Koeitje]

I have a small PC mounted to the back of my monitor which doesn't have an optical output. Using USB to my DAC gives an elevated noise floor, but I know optical will work (I used that in the same setup, but with another PC that also had an optical out). So I'm looking for an USB to optical converter that is as small and cheap as possible. I also don't care about high sampling rate, 48kHz would even be fine, but lets do 96kHz for the sake of it. Does anyone have any suggestions?

So far I've spotted this one:

Amazon.nl

 

[staticV3]

Hifime USB to Optical converter

The UT23 connects to your computer via USB and sends out an optical SPDIF signal. There is no DAC involved, just the USB to optical feature.

hifimediy.com

 

[scrubb]

I use the Douk Audio U2 to go from Raspberry Pi streamer to my AVR:

Douk Audio U2 XMOS XU208 USB to Coaxial/Optical Converter Digital Interface Audio Adapter DSD

U2 is a USB to Toslink optical and coaxial converter, suitable for PC computer, notebook, android phone(OTG), set-top box, rock 64, raspberry pi and so on, it can bring better listening experience than PC own sound card. Features Adopting the digital interface of XMOS XU208 chip solution, with...

doukaudio.com

It was measured here:

PHIREE U2S 2019 & Douk Audio U2 Review and Measurements (Digital USB to S/PDIF Interfaces)

PHIREE U2S 2019 & Douk Audio U2 Review and Measurements (Digital USB to S/PDIF Interfaces) Update March 2022: Added comparison with the Douk Audio U2. Here is a quick review of the PHIREE U2S 2019 digital interface. This is basically some USB to S/PDIF converter that allows you to get USB...

www.audiosciencereview.com

 

[Koeitje]

The Douk is a bit clunky and too expensive for my use case. That Hifime is an option, but also a lot more expensive than what I find for a bigger formfactor but probably better odds that its good.

For reference this is what my setup looks like, so I need something small:

I also saw this one:

Amazon.com

(I'll have to order it through Aliexpress, Amazon.nl doesn't have it)

 

[JLGF1]

DSD Tech Optical Adapter

(no direct experience with this unit)

 

[zeropoint]

Cubilux USB Type C to TOSLINK Optical Audio Adapter, SPDIF Digital Converter​

https://www.amazon.co.uk/gp/product/B09QFYNB7Y/