There is no effect if you keep expfm down and not use the crossping setting.
I always recommend starting out with no expfm, step fully ccw, fairly high q on each channel, pingless and slow.
Some settings make not so much sense to me personally without input unless I want do the farty fart thing (fast crossping), however if you run audio in and dial back q these options make much more sense (to me).
I also recommend pinging other synths via midi out and running them into the audio in. Also sequencing the Wing Pinger via a Tracker is good fun.
Meng Qi shared this Max for live device with me but I haven’t checked it out myself yet:Wing Pinger Resonator.amxd (3.6 MB)
Also, Wingies should be on their way soonish as well!