If these two notes are being played at the same time we call it a harmonic interval (also called adouble stopin guitar terminology). If they’re played after each other we call it a melodic interval. An interval of an octave is the distance between a pitch (say, the note A, which w...
Guitar in fourths.(guitar tuning with all strings in perfect fourth intervals apart; includes 3 sets of annotated tablature examples)(Sessions)(Brief Article)(Illustration)Nash, Paul
Interval is a distance between two notes measured by number of semitones, or half-steps. On the guitar, one fret represents a semitone. Twelve frets make an octave. Some intervals extend above the octave. Those are called compound intervals. For example: the major 3rd (normally 4 frets), ...