This musical seesawing can in theory go on indefinitely, as long as you can keep up sustain and volume (easier on electric guitar than acoustic) A rapid such series of hammer-ons and pull-offs between a single pair of notes is called a trill.
This musical seesawing can in theory go on indefinitely, as long as you can keep up sustain and volume (easier on electric guitar than acoustic) A rapid such series of hammer-ons and pull-offs between a single pair of notes is called a trill.