Klarinet Archive - Posting 000268.txt from 1999/11

From: "Edwin V. Lacy" <el2@-----.edu>
Subj: Re: [kl] KEYS
Date: Mon, 8 Nov 1999 14:33:03 -0500

On Mon, 8 Nov 1999, Dodgshun family wrote:

> He was playing under fluorescent lights, and noticed that when he
> played his open G, he could see a brown line beating reasonably slowly
> next to the string (which was vibrating too fast to be seen). It took
> an electrical engineer (my father) to come up with the answer to what
> this was; fluorescents cycle at 100Hz, and the G is at 102Hz, so what
> Andrew was seeing was the sound beating against the light.

Then, your brother was playing sharp. The open G string should vibrate at
97.999Hz. :-)

In an especially picky mood today,

Ed Lacy
el2@-----.edu

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