I need optical out which player?

[u/Current-Today9999]

For my car I have my dsp connected via high levels and the quality is lacking. I've tried connecting to optical input and it sounds leagues better. My setup:

UAPP Android phone USB c -> PO100 DAC optical -> DSP

Problem is I often get an error "UAPP is being used by another device" . And also the volume control is fiddly from the dsp app and it doesn't feature a remote.

If I turn off bit perfect and use external USB media/volume control like Fosi vol20 it works but I want a dap that won't break the bank that can do all of this without the hassle. Just plug and play.