DADDARIO / TUNING FORKS Aキー (440Hz)[PWTF-A]

D'Addario's TUNING FORKS A keys provide an accurate A (440 Hz) reference pitch to help you tune by ear on guitars, basses, and orchestral instruments. It is ideal for classical, violin, and home studio use.

Tuning fork
Key A (440Hz)
■How to use a tuning fork
Hold the tuning fork by its handle with one hand and lightly tap the pointed end on a hard surface such as your knee or a chair. The tuning fork will resonate and produce a specific pitch, generally A (440Hz) or E (329.6Hz). The instrument is tuned to that pitch.