A=440 was Tuning

[paul bruesch]

There's been considerable posting about these which you can find by
searching the archives. I easily found one source by searching the archives
for <beats mp3> (no brackets)

On Wed, May 7, 2008 at 11:23 AM, Matthew Todd <toddpianoworks at att.net>
wrote:

> Isn't there a website that has audio files of bps?  Do any of you know
> where it's located?
>
> Matthew
>
> *Robert Scott <fixthatpiano at yahoo.com>* wrote:
>
> david at piano.plus.com wrote:
>
> > I came across a website that has a nice 440Hz tone, with a great
> > demonstration of beats between 440, 441 and 442. It's at:
> > http://www.indiana.edu/~emusic/acoustics/phase.htm<http://www.indiana.edu/%7Eemusic/acoustics/phase.htm>
>
> > Bottom of the page has the demo. I did wonder whether different sound
> > cards might affect the accuracy, but I've tried it on several computers
> > and get identical results.
>
> There is no magic way to get a tone that is more precise than the quartz
> crystal in your sound card.  I have a sound card that has a known offset
> from its calibration in sound generating mode in TuneLab.  When I go to that
> website and play A400, I get a tone that is off by exactly the amount
> indicated by the TuneLab calibration.  So if you get exactly A440, then you
> aare just lucky that your soundcard was not very far off.
>
> Robert Scott
> Ypsilanti, Michigan
>
>
>
>
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