Can I record from PC to DCC via USB to toslink optical cable?

Did anyone try it before?

Yes. Ive got a cheap Chinese USB>Tolink adapter and it works fine on DCC

Theoretically if I use hi fidelity streaming service is it going to be ultimate sound quality of recording from PC to DCC via USB to optical connector?

Yes, it will work. Just make sure the device is configured to generate 44.1 or 48 kHz stereo pcm on the digital cable. DCC recorders don’t understand Dolby Digital or DTS.

The number of bits per sample doesn’t matter. Usually SPDIF devices generate at least 16 bits; the maximum for PCM is 24 bits. More bits is better but the extra bits are ignored by recorders that don’t support them.

=== Jac