The AUSampler software instrument (included with Garage Band) has a built-in A-440 tone. I'm not at a computer that I can test it on right but if you select that and nothing else (no other sample ...

We all know that electric utilities in the United States generate electricity at various 60-Hz voltage levels that result in a sine wave waveform. The height, or amplitude, of this sine wave is called ...

In which we embark on a quest to forge a precise triangle wave, and use that to help set a gold standard for fake sine waves. How well will we fare? A while ago, I needed (or wanted) a pocket-sized ...