Ruby resampling help

[adamszabo]

Hey guys, I am trying to mimic the array resampling module with ruby, and I found something online but it doesnt really do the same thing. Can anyone with some expertise crack this?

Thank you!

[Youlean]

Hey guys, I am trying to mimic the array resampling module with ruby, and I found something online but it doesnt really do the same thing. Can anyone with some expertise crack this?

Thank you!

Why do you need that?

[Logado]

it looks close, the code is ugly, I do not know Ruby very well ;(

[adamszabo]

Thank you, looks interesting! I would need it because I would like to replace a whole green stuff with only ruby to make it nicer and more effective

[adamszabo]

Logado, thanks to your help I could understand whats going on and I made a more Ruby-ish version. It works great! Now only if I knew how to make the cubic interpolation and that smoothing they use in the resampler module

[nix]

as far as I have gathered, linear is a good one, it's what I would set the resample to

- sorry I would struggle to help

edit- to smooth the end points, multiply by a faded array of points

[Logado]

I've never used a cubic interpolation, maybe you'll find the answer here.
I think we need to, hook more samples and use a frac instead of a t in formulas
https://www.ibiblio.org/e-notes/Splines/Intro.htm

[tulamide]

I made several examples of cubic interpolation. A descripted version can be found in the module definition of my spline class.
http://flowstone.guru/downloads/ruby-for-flowstone-expansion-spline-class/

But basically: You can derive cubic from linear, when omitting higher math.

lin = a + x * (b - a)
quad = lin1 + x * (lin2 - lin1)
cubic = quad1 + x * (quad2 - quad1)

cubic needs 4 poles and a position/time value

a, b, c, d

lin1 uses a,b
lin2 uses b,c
lin3 uses c,d

quad1 uses lin1, lin2
quad2 uses lin2, lin3

Happy programming (or copying from the spline class's module)

[Youlean]

Thank you, looks interesting! I would need it because I would like to replace a whole green stuff with only ruby to make it nicer and more effective

Well Ruby won't be much faster than green. You should use dll if you want speed. I could make dll for that if you need.

[adamszabo]

lin = a + x * (b - a)
quad = lin1 + x * (lin2 - lin1)
cubic = quad1 + x * (quad2 - quad1)

cubic needs 4 poles and a position/time value

a, b, c, d

lin1 uses a,b
lin2 uses b,c
lin3 uses c,d

quad1 uses lin1, lin2
quad2 uses lin2, lin3

I tried my very best but I couldnt make it happen. Any examples?