![](/static/253f0d9b/assets/icons/icon-96x96.png)
![](https://feddit.uk/pictrs/image/603d8ec2-e309-432e-9ed2-eb99b9de82b8.jpeg)
The spinny thing is the head drum. The divots are electromagnetic heads, usually four for video in a HiFi deck. Be careful when cleaning them as they are fragile. Avoid using any kind of material that may snag in their narrow gap. I like to use a strip of white paper wetted with isopropanol, holding it against the drum and turning it with the other hand. Repeat that till the paper comes away clean.
Great card, got one in my 440BX retro rig! Plus an AWE64 Gold and a PnP SB16 with a real OPL3 FM chip. That’s just a bit of what’s kicking around here…