Flute Tuner

[Nelson Zink]

Mark,

> The good news here is that a flute produces the closest thing to a
> pure sine wave that you can get from a musical instrument. You'd
> probably have to open the audio in port and start counting
> zero-crossings and reject anything too far out of band.

That's the basic idea.

> Even looking at just an A-440Hz signal, though, that means looking
> looking for a transition every 1.8 milliseconds. System ticks aren't
> that accurate.

The program wouldn't report more often than maybe a fifth of second
(averaging maybe 50 cycles) or else the output gets too jittery.

Nelson