Opening, flat, closing, lighting, extinguishing, opening, flat, closing. The actions are well dissociated to facilitate the assembly. UCS Category: MACHAppl. Duration: 00:55.
Beep of a truck goes back. This sound was made on computer. It is a triangular wave of frequency 1220 Hz. Easy to loop. UCS Category: BEEPVeh. Duration: 00:19.
I take an escalator going up, coming out of the metro. Recording in motion, from bottom to top, then moving away. UCS Category: MACHEscl. Duration: 00:30.