Have you wondered about the optimal range for harp glissando? This question has come up frequently in conversations with composers, so I thought would share my guidelines here.

Short answer: It depends, but probably larger than you think.

To determine the optimal range for a glissando, we need to consider two variables:

1. SPEED

2. DYNAMICS

For a glissando to actually sound like a glissando (and not a scale), it needs to be have a certain speed. That threshold is around 32nd notes at 100bmp, or approximately 1 octave. This means that any slower than this speed, a one octave glissando will sound more like a scale than a glissando.

In addition to speed, we also need to consider the volume. In general, a glissando spanning a larger range will be louder. This is because the momentum of the glissando motion makes it easier to play loud. Whereas a smaller glissando range will more likely be quiet.

And yes, there are exceptions. There are always exceptions! But, these exceptions are working **against** the natural glissando motion, rather than with. (Hint hint: clarity in dynamics is important if you want a wide range quiet glissando!)

These two variables, speed and dynamics, will help you determine your range.

Do you want a loud, fast glissando? Use a wide range! Do you want a quiet, slower glissando? A smaller range might work fine.

Pro tip: As a general rule, I tend to recommend a default of to a 2-3 octave glissando range vs. 1 octave.

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