Cool idea but for a surprising reason I don't need it. Towards the end of the classic era of Japanese hi-fi, even mid-fi turntables out of Japan made this app

Cool idea but for a surprising reason I don't need it. Towards the end of the classic era of Japanese hi-fi, even mid-fi turntables out of Japan made this app superfluous. There were quite a few "quartz locked" models which offer great speed fidelity without having to muddle around with anything. As an example, the Technics SL1400 Mk 2 is a quartz locked, direct drive table that has a little window so you can see the speed on the turntable markings AND has digital adjustment of the speed, not that you ever need to move it off 0 because it's already spot on. I also have a cheaper JVC table (QL-A2) which doesn't have the crazy adjustability of the Technics, but is still spot-on all the time. I can see this app being useful for cheap, modern belt drive garbage they are shovelling out now.