This final sound was generated from a whistle, created with frenquencies going from 300 Hz to 600 Hz, with an icreasing amplitude. A wah-wah effect was added to created a modular sound that seems like an engine from an unknown spaceship.
VALENTIN_Alexis_2015_2016_UFO-engine.wav
聲道：1
類型：wav
ray、spaceship、futurist、alien、ufo、sci-fi、laser、engine
射線、飛船、未來學家、外僑、飛碟、科幻、激光、發動機
資料來源：freesound ( https://freesound.org )