Leaderboard

This is a project that came to being thanks to a free model from SketchUp. I've an interest in electronic traces on screens eg Lissajous curves, spirograph traces etc and needed an oscilloscope to display an audio sweep. Turbosquid wanted $100-200 for a really nice 'scope, but luckily I found a half decent one free on SketchUp that was usable with a few tweaks. The next problem was the math. The human ear is logarithmic ie works on powers of 2 (octaves on a piano is a doubling of frequency), so I wanted to use a log frequency sweep (linear just sounds wrong). I delved into exponential math and came up with this. The display and digital readout correspond quite well to the frequency heard. Screen is a movie used as a mat, font is Digital Readout Upright. 10MB file for screen https://www.dropbox.com/s/bfmfps9emp8dwtv/sweep.zip?dl=1 audio tone/sweep generator free from here just a bit of fun really