Most harps have a pitch range of about six octaves, from the lowest note (C2) to the highest note (C7). However, some harps may have a wider or narrower pitch range.
For example, the smallest harps, known as lap harps or Celtic harps, typically have a pitch range of about four octaves. Conversely, the largest harps, known as concert harps or orchestral harps, can have a pitch range of up to seven octaves.
The pitch range of a harp is determined by the length of its strings. Longer strings produce lower notes, while shorter strings produce higher notes.
The strings of a harp are typically made of nylon or gut, and they are tuned using a tuning key. The tuning key is used to turn the tuning pegs, which are located at the top of the harp.