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> Now, I don't understand anything about DSP and sound and the frequency domain. Without going into theory, just look at it. It's the addition of a square wave
by im3w1l 6y ago
> Now, I don't understand anything about DSP and sound and the frequency domain.
Without going into theory, just look at it. It's the addition of a square wave and a sine wave now. And a square wave has lots of harmonics, giving that buzzy sound.
- skrebbel 6y agonot entirely, because the square wave isn't regular. in graphical terms, the space between each time the square goes up and down is irregular. that gives it a totally different (and, notably, more atonal) sound than a normal square wave. also, the sine wave got flipped, half, kinda. just mixing a square wave with something has a totally different effect than this. it'll sound like the original sound and also a square wave tone playing together.
- louthy 6y ago> And a square wave has lots of harmonics A square wave is 100% distortion effectively. It's an infinite series of sine-waves (although the infinite series isn't needed to generate a square wave, just the sum of harmonics up to nyquist)
- willis936 6y agoWell, no. In any finite range of frequencies there are infinitely more harmonics that are in a noise signal than are in a square wave. In the audible frequency and dynamic ranges, you realistically can’t perceive more than maybe 7 harmonics in a square wave and it sounds very different than a noise signal.
- willis936 6y agoI think it’s the multiplication of the two waveforms (aka mixing). The spectrums are convolved. It’s a common technique. Square waves are a fun case to explore here because you might start finding cases where something you might just consider 180 degree phase jumps (PSK) actually effect the magnitude spectrum (square wave). They don’t teach you that in school!