Kim, you are very bad!
Flatbed scanner and an undergraduate programming project, then...
Nice. What turntable is that?That's essentially what the Lencos have but with detents for the common speeds (ignore the red circle its a picture I just nicked form google search)
WIth the old gramophones that could play all the speeds you'd flip the needle over to use one specifically for 78s. I think they were thicker and stronger - ISTR that using the LP needle on 78s would destroy the needle, using the 78 needle on vinyl would destroy the vinyl - so it's not as easy as just modifying the playback speed.Ob NTNON:- https://www.youtube.com/watch?v=DvswW6M7bMo