I have an idea for a signal chain that requires me to add an inverted portion of a signal. Is there an easy way to just flip a signal, or do I need to learn making LV2 plugins?
I couldn’t find a plugin for it.
A 180 degree phase shift ought to do it. I didn’t find a plugin on Patchstorage for this, but I think this one might be able to achieve it: x42 Phase Rotate - you may be able to install the ARM or ARM64 build into your /var/modep/lv2 folder manually.
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Thank you for the quick response! I will check it out whenever I can 
It would be the most simple plugin to just invert a signal by multiplying the input with -1 
Update: It seems to be a rather easy effect to make, but I also realised I could do this with an impulse response that is just a flipped dirac.
It would be one sample that is -1 followed by zeros. That would be simpler to implement although it might be a bit more DSP intense than an actual inverter.
I haven’t tried either of the solutions yet. But I will make an update here when I have 