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Pitch detection and sound source mapping

Hi everyone,

recently I’m designing a sound source movement, and I’m trying to find a continuous smooth pitch shift within the sound of simultaneously sweeping three strings of a string instrument while doing the portamento.
I’m currently using “fluid.pitch” and “zl,” but the values are still a bit jumpy. I’m wondering if there’s a better design approach.

Thank you all. Video via link below is my current progress, experimenting with the surround panner for the moment.

Thanks again !