I'll take your word for it, but this is one of those occasions where I understand what I've coded, but I don't really understand how it actually works. I'm just glad that it does!TheMartian wrote: ↑Sat Nov 04, 2023 7:12 am I believe the cause for this effect resides in Nyquist theorem: You need the signal to be frequency-limited previous to a sampling process (the creation of the WAV file is a sampling at 44100). If the signal is not bound in frequency to half the sampling frequency there'll be aliasing.
An audio (and #AUDIO) question
Re: An audio (and #AUDIO) question
Re: An audio (and #AUDIO) question
Yes, square waves have odd harmonics. That is, a perfect square wave is equivalent to a bunch of sine waves at 1, 3, 5, 7 … Infinity times the base frequency, tailing off in amplitude as it goes higher, all superimposed on top of each other. The Speccy beeper is far from a perfect square wave but unfiltered harmonics above the nyquist limit can have an audible effect.
Robin Verhagen-Guest
SevenFFF / Threetwosevensixseven / colonel32
NXtel • NXTP • ESP Update • ESP Reset • CSpect Plugins
SevenFFF / Threetwosevensixseven / colonel32
NXtel • NXTP • ESP Update • ESP Reset • CSpect Plugins