My Singer Quantum is air electronic too! When I bring it to a sew day no one believes the foot petal is is non electric but runs on or makes air. I haven't figured that out at all. But it doesn't make any sewing noise, it's a quiet hum. No needle going up and down noise. I use it for decorative stitches. It's the first of the Quantum line and very hard to find. Even the same model number I've found isn't like the very first ones. I bought it before I started quilting. It has great decorative stitches.