DSP Robotics Support

Hi, I want to understand how the feedback delay works over 100%
For some delays, you can use feedback greater than 100% and adds saturation. I try to do something like this in flowstone, but the feedback of more than 100% always gives an infinite increase in volume. Can someone help figure out how to do this? How to stop the infinite increase in amplitude?

100% means everything is fed back at the same level as the input, so in a perfect world you would get an infinite repeat, assuming there were no non-linearites in the system.

Beyond 100% you put output more back in than the input level, so it will always get progressively louder with each repeat. If you add a limiter or a tan(h) saturator , or both, the sound will become progressively more distorted with more repeats because you added a non-linear element.

So I don’t really understand what you’re looking for at this point. Maybe you could explain in a bit more detail…

Cheers

Spogg

like Spogg already mentioned you need to clip the feedback signal, which will add distortion when the feedback signal gets louder, to control this you can add some saturation or softclipper before...

for example use something like this module to control your feedback signal...
inside the module you can control the saturation level, i used some simple softsaturation algo.
for the feedbackamp you can use >1 values... just find some scale between the sat level and the feedback amp which fits your taste.

"Sorry, the board attachment quota has been reached." i'm not able to attach an example!? @spogg?

This happened to me ages ago and I emailed malc@dsprobotics.com to get unlimited uploads.

Unfortunately I’m only a moderator so I don’t have full admin rights to do it myself.

You could try MyCo but I think he’s in the same position.


Cheers

Spogg

thanks spogg, i e-mailed malc..

Thank you for reply.
For example the h-delay plugin.

I send a short signal to the plugin and do 100% feedback
It looks like this
https://i.gyazo.com/5f2a265ff55974bff04 ... 082f81.png
just infinite repeat

then I increased the feedback by 200%
looks like this
https://i.gyazo.com/c0a0dd90f7b772f5b27 ... e74cb0.png
it seems that the volume has increased and saturation is used

But when I do 100% feedback again, the already saturated signal repeats.
https://i.gyazo.com/ca90b84d7bcbe5e4bcf ... c46d00.png

If you use saturation before the plugin, you need to send a signal again so that saturation appears
If you use saturation after the plug-in, then after feedback is returned to 100%, the volume decreases, and saturation disappears.

To me, it looks like saturation works with a buffer inside the delay.

I don't think this is a very useful feature, but I want to figure out how it works.

Yes the pictures show increased harmonic content produced by the distortion effect from whatever method they use. Could be saturation, compression or limiting.

It’s what I would expect and when I experimented with your schematic before I posted, it’s what I got!

Cheers

Spogg

something like that, got it =)

Logado wrote:something like that, got it =)

Yes! I used different modules but the result was the same.
I'm not sure of the musical application though

Cheers

Spogg