My inspiration for this project was the old crossovers built for the big speaker cabs. With each frequencies being pushed to a certain type of speaker to best emulate that type of sound. I also used a leslie speaker in my NIME last year. The idea of have a physical interaction altering the sound felt much more rewarding than a max patch.
I set my system up for two outputs and decided to use a microphone as an input again. A transducer would capture the lows and the speaker would play the full spectrum with a delay. I would mess around with different gain settings on the transducer creating sounds reminiscent of the old radios.
It was when I started to get feedback from the transducer I decided to play around with different materials and EQ settings. I was able to create a feedback loop that was controllable that it wouldn't peak and kill your ear drums. And as you changed microphone placement the pitch would also change. The delay FX were used to bring depth to the tones. It sounded like whales to me.