The International Tuning Standard
In 1939, an international conference established A4 = 440 Hz as the standard concert pitch. But it wasn't always this way.
Historical Variations
Throughout history, concert pitch has varied wildly:
| Era | Typical A4 Frequency |
|---|---|
| Baroque (1700s) | 415 Hz |
| Classical (1800s) | 430-435 Hz |
| Modern | 440 Hz |
| Some orchestras today | 442-445 Hz |
Why 440?
The choice of 440 Hz was somewhat arbitrary. It was a compromise between:
- European orchestras (which preferred higher pitches for "brilliance")
- American manufacturers (who wanted standardization)
- Singer preferences (who found lower pitches easier)
The Debate Continues
Some musicians advocate for A432, claiming it sounds more natural and resonates with the universe. While scientifically unproven, it remains a popular alternative in some circles.