Cleaner DPO Sine - Secrets Make Noise don't want you to know! 

They're very much related and the terms can often be used interchangeably. HP filters / differentiator, LP filter / integrator.

@@Hermbot Holy shmokes, calculus is now my best friend.

If you had 3d oscilloscope, you would see that sine in actually spiral...and spirals are everywhere in nature

@@sandidjulkic6497 You mean the imaginary number plane?

There is no adjustment for the square wave, no.

Depends on how you look at it, I suppose. Sine waves absolutely do exist in nature, they are the building block for all sounds. Our good friend Jean Baptiste Fourier proved many years ago that all sounds can be decomposed to individual sine waves / frequencies.

@@Hermbot For sure, but only mathematically

An interesting discussion about it here :-) physics.stackexchange.com/questions/354159/are-there-pure-sine-waves-in-nature-or-are-they-a-mathematical-construct-that-he

Your man Curtis "Risky" Roads does a little riff in Microsounds about the (un)naturalness of sine waves as the basis for analysing timbres and tone. His beef was basically they only really work if you're analysing a sound as a wave as having infinite duration made of other waves of infinite duration, and he quibbled with using Fourier analysis as the fundamental analysis tool as it essentially ignored critical temporal factors, and also because "Jean-Baptiste Fourier never did a badbwoy sub-bass in his life" and was "a total mid-range poseur." I know it seems controversial but those were his words not mine.

@@axonandon lol. Just wanna let you know I really appreciate this comment!