Need help building an exponential attack

that's no problem: instead of x you have to set x/T, where T is the time in seconds you want to set.

ciao herw

 

There's my draft so far.
decay and release are non-linear already. It is only the attack that is linear.

 

here's a simple primary solution:

http://www.nireaktor.com/wp-content/uploads/2014/01/pic31.png

i'm not sure this is the type of exponential curve you want on an attack - wouldn't you technically want more of a logarithmic shape (not technically, but visually)? it would be easy to fix this for just one stage using the St output of the 4-ramp.

anyway, this is probably the easiest method, and it solves the annoying timing issues with the primary ADSR.

donwload is available here - http://www.nireaktor.com/reaktor-tutorials/creating-custom-envelopes-in-reakto/

 

I've attached three examples of envelopes. First Salamanderanagrams primary solution above.
The decay stage doesn't look that good I'd say.

Then a simple adsr and last a simple adsr which output is multiplied by it self. . I'd say the last is my prefered.

My example above is looking like a Minimoog and sounds a bit different from the example included in this post. It's often used in illustrations but I don't know how common it actually is.

 

double post

 

ahh, thanks for saying that - i felt something was weird with the decay too.
now i think i know what the problem is - check out the decay when the sustain is set close to zero, it looks a lot better!
so i need to somehow scale the decay section... an interesting problem, but probably one that could be solved with a few modules.

edit - eyep, got the decay section fixed, and of course the release section needs some work too - it looks better because you always get the smooth tail, but it's wrong, just like the decay.

edit 2 - okay, fixed now, with proper decay and release, you can download from the same location. let me know if you find any errors, primary is not great for this sort of stuff. if anybody wanted to really use this i would suggest translating at least the 'scale up' and 'scale down' macros into core, you could save a lot of CPU.

 

You are right. Squaring or raising to the power of 3, 4, etc. is only a quick and unsatisfying solution, especially when using different curves for every phase. Another reason is the CPU: the more power modules you are using the more the algorithm is inefficient (in core too). Another reason is that it is difficult to get a simple termination condition because in primary f.i. you get two events when squaring. You have to use value- and order-modules to prevent unwished condition values. If you want to build it in primary you can use the multiramp envelope to get well defined phase length like you did some posts above. But you have to do much mathematics to get a proper translation without jumps.
Another reason is that the power-function is difficult to handle when changing the curve continously (f.i. pitch modulated etc.). And last but not least: all phases have to get the actual value from the last preceding phase. So you have to use a common memory - only possible in core with OBC connections.

ciao herw

 

I did some experiments with this a while back, and actually I think both herw and Salamanderanagram helped me out with various stuff (thanks for that . I now have two core cells that do either a log attack, or an exp attack, and are modifications of the core adsr. The log one also has a hold stage. In general my thoughts about the log attack approach ended up being that it emulates an RC filter, so you can get nice results by passing a step function through an LP filter. The exp just needed some tweaking in the attack module.

Here is a picture of the mod to the attack module in the exp version, hope that helps. Shouldn't take any more CPU then the regular core ADSR, and it should get you all the bells and whistles that come with the core ADSR.

 

Hello!
Im new here. and i dont know much about reaktor.
Would you share them modules with me? thank you very much.

 

Owen's last seen was in 2014 April, 19th

herwig point to the multi break point ADSR (MBP env) in post #009
here is a link to MBP Block with uni/bi-polar using
https://www.native-instruments.com/de/reaktor-community/reaktor-user-library/entry/show/10753/
Original Block by Daryl Posnett and info are here:
https://www.native-instruments.com/de/reaktor-community/reaktor-user-library/entry/show/9009/

 

bad luck

 

Please follow the links to the user library

 

I appreciate your help. but its just that im still new in the whole reaktor world, and that block seems a bit too complicated for me.
what i need is just a simple adsr envelope with variable slope.Thanks anyways.

 

Then take the solution from zootook #24

multiply the output by itself. that's not difficult.

Isn't a release knob variable?

 

there is a factory ahdsr envelope with curve control of the a, d and r stages in the factory content now.

hit enter, then type ahdsr, it will come up, you want the "library" one.

 

I did check it and seems like it has curve control for A and D but no R. But i guess its something.

Thank you.

 

just look inside the core cell and add another controls to the r bend input.

I have no idea why NI made it without that control on the panel, but it's already built into the module.

 

Here is one that has all controls enabled from one of my projects, you can just use this.

 

Thank you sir.
This whole reaktor thing seems quite fascinating.
I have had this idea of creating a sort of sequel to Synth1 with some extra bells and whistles, and seems like with reaktor i will be able to do it.
If it only stopped crashing every 5 mins.

Thank you very much.

 

Fine Michael.

Reaktor or Synth 1?