A recording of a starting eurocopter ec-135. Distance ca. 20m. Due to noisy surroundings i could only use the sound starting from idle to takeoff. Recorded with the stereo mic of my h6-zoom, handheld.
The wonderful sounds of a 1981 ibm pc model 5150 being turned on, the 5. 25" disk drive checking if a diskette is inserted, the pc emitting its idle hum, and finally being turned back off.
This is exactly what you think. An ice cream truck sat idle a few doors down from me and i got two runs of the song it plays before people came out or a car went by. The song is pretty clean.