as I know from the GPO Harp Tutorial there are far more common playing techiques as I know so far, like upwards chords roll (even two-handed), wavy line and such. Is there a ressource with more information about common playing techniques even with examples (score or midi) elsewhere? As an example I'm pretty much interested in things like the good ol' up-down-up-down-up-down and the derivated stuff (like the hands "following each other in upward glissandi" - probably a derivate from wavy). I tried to find something new but I'm a lousy pathfinder, so far I just found some sites showing the harp basics.