With resemblance to the sound of an engine, this sound can be used with various different mechanical objects in mind. This sound was bounced into 24bit, 48hz, interleaved audio. This sound was synthesised using a digital synthesiser.
Motorcycle in the distance. I generated this sound by a gazouillis effect, played with the level envelope, the wahwah effect with 43% depth, i modified the height and the tempo to bring a more serious tone. The whole set to hear a motorcycle in the distance.