Note: For smartphone, it’s advice to use this app in landscape mode.
Harp 1
High register (sound 1 octave down for better tuning)
Normal register (sound in real octave)
Low register (sound 1 octave up for better tuning)
Very low register (sound 2 octave up for better tuning)
Harp 2
High register (sound 1 octave down for better tuning)
Normal register (sound in real octave)
Low register (sound 1 octave up for better tuning)
Very low register (sound 2 octave up for better tuning)