I admit I didnt think bandpass was possible in stock ompt, but this has got me intrigued - I looked up how to do bandpass on IIR and this is the first result that came up
https://www.dsprelated.com/showarticle/1257.php... which, I am going to be honest, to my untechnical mind just scared me.
Could you give an example of how we could cascade in OMPT? My first guess (probably wrong, please feel free to tell me how stupid I am being) is to make two clone instruments, phase inverted and then have them play at the same time (testing the theory as I go) then match the resonance, have one highpass and one lowpass and play with the cutoff...
It seems to do an interesting sweep - I will attach an example I played with (drawn sample, phase inverted)- but I very much doubt this is the answer.
Saga, if you could give a basic example, I would also be very interested in learning this.