15 Jun '06 03:22>1 edit
I was playing slide guitar the other day when I noticed if instead of the normal way of holding the slide, perpendicular to the strings, if you bend in so the slide is over the second string 15th fret and the 17th fret of the 4th string that makes a perfect 5th, its the same thing as just fingering down the 15th fret second string and 17th fret 4th string, is a perfect 5th. So you get the same perfect 5th if you do the same thing but down one octave, now its the 2nd string 3rd fret and 4th string 5th fret, same thing but an octave down. The thing I want to show is the angle of the slide is less, approaching parallel with the strings, not quite but going in that direction. So imagine a guitar with the same string separation but the strings are a kilometer long and you can see that angle will approach but not equal being parallel to the strings and as you go up to the bridge it will go towards being perpendicular to the strings but not quite. The thing I want to know is what is the mathematical function that would describe that change of angle of the slide during the making of that perfect 5th up and down the strings? The strings are in regular tuning BTW. EADGBE.