In the old days of PCs (maybe even now) there was a way to click the speaker at a specific frequency- I wrote a simple x86 code to click, delay, click, delay an

In the old days of PCs (maybe even now) there was a way to click the speaker at a specific frequency- I wrote a simple x86 code to click, delay, click, delay and proudly told my office mate that I could make my computer play A440. He listened for a bit and said, nope that's 441 or so. I checked, and my program had a tiny bug where it wasn't delaying long enough. Fixed that, he verified it was now A440. He said he had perfect pitch and it was really annoying because almost everything was out of tune.