Convert USB to SPDIF

I'm running from Windows 10 laptop to Schiit Wyrd( decrapifier) then in Project box S2. Will converting usb to spiff always sound better?

There may be a cheaper way to improve your sound.  Replace your wall-wart power supply on the Project Box S2 DAC with a linear power supply such as this one:

https://www.ebay.com/itm/Hifi-Linear-Power-Supply-for-Pro-Ject-Pre-Box-S2-Digital-Preamp-and-DAC-L17-48/143261499196

That would significantly improve your sound quality at a lower cost of about $136 USD. 

You could also get a better power supply such as the LKS:

https://www.ebay.com/itm/LKS-Linear-power-supply-DC-5V-USB-5V-for-DAC-with-25VA-Talema-transformer-PSU/133558190349

Then buy a USB cable with a "Micro-USB" connector on one side for your S2 dac.

Here is an affordable solution: https://www.electricalengineering.xyz/videos/lt-usb-to-spdif-converter/
If you want something more better here it is as auxinput already mentioned.
https://apos.audio/collections/brand-spotlight-matrix/products/matrix-x-spdif-2-usb-interface

Hello Mahler123, I do not have a solution for your question, but a question myself. May I ask for your expertise and guidance? ow can I connect my music collection on a FLAC USB to my pre-amp listed here? My sound system is an early 80s ‘stack’ system.

None of the components are digital: Bryston 2B solid state amp, Conrad-Johnson PV-11 pre-amp, MIT 330 interconnects, MusicWave phase-equalized speaker cables, California Audio Labs CD Alpha and Delta drive, Dual 1129 turntable. B&W 803 speakers.

I would appreciate your suggestions and guidance on the matter.Thank you.

Mark Saracino

You can’t.  You need to add a DAC, and one that will accept usb.  And you probably need a “Player” and that can read the files on the flash drive and send them to the DAC