[johtso]

Looking at the "about" page for the project, it explains that they're using a special turntable with 4 styli that can record simultaneously. So it doesn't really increase the workload by 4 times to archive in this more thorough way.

https://archive.org/details/georgeblood&tab=about

[stordoff]

That's extremely cool. With decent headphones (ATH-M50x), there is a noticeable difference between the styli, so probably worth the extra work for archival.

[leoc]

The next step up would presumably be a 3D-scanning method like IRENE: http://irene.lbl.gov/

[guyfawkes303]

Now that is cool.