Symmetrical graphic shaper
Is there a way of making the graphic shaper affect the input signal symmetrically (i.e. same shape for negative and positive)? I imagine there's a way to wire up the shaper in unipolar mode and an inverter somehow but I can't figure out.
Comments
That's what it does.
The right half of the shape affects the positive and the left half affects the negative part of the waveform.
You could also split the input signal into separate processing paths using one GS for positive and one for negative but I don't think that's what you're looking for.
I have a feeling the OP is after an option to edit the left and right side at the same time but 'mirrored'.
So if I move the left bottom up the right top would go down by equal amount...
This actually works, but risks adding glitches when crossing zero. I implemented a simple saturation in the Graphic Shaper. The full wave rectifier sends a non-negative signal to the GS. The B>A Function is 1 when the original signal is negative, and switches in the inverter to restore the original sign.
set a point in the exact middle
set a 2 nd point on the left side and start bending the curve
now set a 3 rd point its the same but upside down on the other side
...
"mirrowed" would be simpler
but "asymmetric" hm, is more fruitful
draw something simple and listen
this quickly starts starts to sing a,e,i,o,u
depending if you stretch the curve up or down
it gos between more nasal or more formant
aaaa
ööööö
its not a bad idea to hipass filter the output of your weird drawing
It's tricky to produce the exact mirror image, isn't it? Note that the curve bends at the origin, so it's not symmetric.
I guess drawing a waveform to an oscilloscope is tricky anyway
the oscilloscope lies to you
you have all these things that looks completely different but sound absolutely the same 😂
but I can draw interesting sounding things in seconds
Yes indeed this is what I'm after. It's relatively easy to achieve somewhat precise results manually for simpler shapers, but for more complex ones it gets tricky.
Thanks! It makes sense to me, I'll give it a try
@lala thanks for those examples; even if they're not really what I'm after now I do like to experiment with the shaper in all kinds of ways so these are great starting points
lots of ways to do something like this.
If you are sending in waveforms, you may want to turn antialiasing off.
The first shaper converts any signal into either 1 or -1. The original signal is Full rectified so it is always positive. This is sent into the second shaper. You set the positive curve here. Then multiply that curve by the first shaper.
Lovely, thanks! I always forget about the usefulness of rectifiers :)
@giku this reminds me: there doesn't seem to be a way of saving a rack in compact view when it is too narrow, do you think this could be addressed?
uncompact the rack, tap on the header to open the rack options, recompact the rack using the switch. the options window will stay visible so you can save a compacted preset.
Excellent, thanks again everybody!