Capturing audio is easy.
Just put your record mixer on "what you hear" and record it as you play it !I like that !!!
I play a lot of vinyl. I went down and took that photo mainly to show the clamp for Kingman's Clamp share postings. The photo is a little to dark to show I used the clamp from my record cleaning machine.
Actually, I don't believe a clamp is necessary or desirable if you use a good mat. It is better to just spend the clamp money on that. By design, TT motors are low torque fragile things and any drag is bad. Of course I am not talking about the DJ TTs.
