Processed foley recorded on an early 90s handheld recorder, recorded via line in and processed with reverb, delay and slight eqing. It made for some pretty weird and cool effects.
Cafetaria recording processed by slicing, filtering, and then randomly played samples while sweeping bandpass filter. Added some multivoice echo and reverb.
Gas boiler in my kitchen starts up, you can hear the piezo ignition inflaming the gas and the subsequent burning gas. This version is processed (compressor, eq). Recording by a zoom h2n.