[CAUT] set of C forks

[Ron Nossaman]

> Hi all,
> I found this set of C forks next to the piano in a customer's house 
> today. Rather a curiosity. C3, C4, C5, C6 and C7. The big one in the 
> middle is C7, the thin one on the bottom is C3. They are not quite 
> standard pitch (either 435 or 440), but rather that "powers of 2" series 
> of frequencies: 128, 256, 512, 1024, and 2048 (numbers stamped on each 
> fork). The owner knew nothing about them. I suspect they might have been 
> intended for other than tuning (hearing tests?), but really have no 
> idea. Maybe someone on the list knows something. Anyhow, something curious.

Yup, hearing tests. I have a similar set.
Ron N