DSP Robotics Support

Hey guys,

So I have been here for a while now, reading all the useful tips you guys have, never posted anything until now,

I am wanting to achieve a linear selector using a knob, that can basically mix between multiple sources, be it filter types or different oscillators, I think my problem is with the math in my noob brain, I cant seem to get output B and C in my module to mix naturally, if that explanation even makes sense?

Hopefully you guys can help with my design,

Thanks in advance!!

BOOM!

Do you mean something like this?

ruby, green and stream versions are included.

Oh my!

That is exactly what I was looking for

Thanks a million!!

Here's how I thought about it:
0. take a paper and draw the graphs of functions you want to achieve.
1. the function for all outputs is the same - only offset on x axis - that can be easily archived by subtracting the offset from input.
2.In the range around peak the function in V shaped. abs(x) provides such V shaped function, only flipped vertically.To archive the desired shape we must flip the abs function (by abs(x)*-1) and add y offset of one -> y=1-abs(x)
3. Further from the peak the function is zero both in negative and positive direction - in fact it is not allowed to become negative in value. That can be achieved using max()function -> y=max(0,1-abs(x))
4. Finally we may add the horizontal shifting mentioned in point 1. y=max(0,1-abs(x-offset))

This is how I think when preparing such functions and I believe many people do too. It's a very useful skill to learn, especially for DSP and programming in general.

Thanks for the valued input!

Not sure if you saw my abomination, but now that I look at your simple approach it seems my example is more likely to blow up a cpu before anything constructive happens

Interesting KG; I like your approach because it allows you to add as many different sources to fade between as you need.

I made this 3-way crossfade a while back.

Perfect Human Interface wrote:Interesting KG; I like your approach because it allows you to add as many different sources to fade between as you need.

I made this 3-way crossfade a while back.

That's where the interpolation modules come in handy. See here for an evenly distributed 4 stream fader.