In regards to usb turntables, they are not built for DVS but rather for recording vinyl to digital as they dont support low latency asio drivers, so can’t be used for anything else. you are better of buying a used pair of super OEM’s they are:
- Synq XTRM1
- Stanton T.120/T.120C
- Reloop RP6000
- Stanton STR8-150/ST 150
- Akiyama Acura
- Citronic PD45
- Omnitronic DD5250
- American Audio HTD4.5
you will need 2 stereo inputs on a soundcard to use turntables, something like an audio 4 or higher is ideal, if your on a budget a maya44 or torq connectiv soundcard would be fine.