Applied Acoustic System came out with their first iPad app and it’s a resonator. You might not think you know AAS but If you use Ableton Live, there is a good chance you worked with their technology. They are behind Operator, Analogue, Collision, Electric and Tension virtual synths. With Objeq they offer an audio processor in the form of a resonator. Check out the video for more details.
My Amazon suggested items!