Source: wikibot/piano-key-frequencies
= Piano key frequencies
{wiki=Piano_key_frequencies}
The frequencies of piano keys are based on the equal temperament tuning system, where the octave is divided into 12 equal parts (semitones). The standard tuning reference pitch is typically A4, which is set at 440 Hz. Here's a breakdown of some of the key frequencies for a standard 88-key piano, starting from A0 (the lowest note) up to C8 (the highest note): - A0: 27.