Great and fun app – Soundbeam Review

This is really cool if you're an engineer or geek. Well worth $.99.. I'm sure the iPhone's mic has a certain frequency range, but does it really cutoff at 100hz? Would be nice if it could go lower, preferably down to 20 or so hz, which I'm sure the mic isn't capable of. Maybe with an external mic the scale could shift down to 10hz? Please make it as low as possible!
Review by Michael18284 on Soundbeam.