Hey guys, sorry if this has been shared before – I couldn’t find anything related though.
Basically, I’ve found that picking the string approximately one octave higher than the fretted note produces a very cool tone, almost tubular in nature. For example, if you hold down the 7th fret, try picking the string above the 19th fret, or pick an open string above the 12th fret. Some notes are not exactly one octave higher (for the above example you may pick anywhere from fret 18-20), but I think this has to do with a guitar’s intonation more than anything else. Experiment!
This works especially well when sweep picking or tremolo picking, and is much more noticeable on the higher strings.
On a side note, I’m pretty darn sure the tubular sound is a result of the harmonic overtones being produced by picking at the node (dead center) of the string.
— Jeff