What the harp may be a part-time fifth member of the orchestral strings.?

The harp is often considered a part-time fifth member of the orchestral strings due to its unique role and sound within the string family. While it shares similarities with violins, violas, cellos, and double basses, the harp's distinct timbre and playing techniques set it apart. Its versatility allows it to blend beautifully with other instruments, adding texture and depth to orchestral compositions. However, its use can be less frequent than the core string instruments, hence the "part-time" designation.