An engine sound effect created using "Crystal", a freeware and extremely powerful synthesizer (that unfortunately consumes a lot of processing power).
The sound changes in pitch much like an engine appears to change in pitch as it drives by due to the Doppler Effect.

Comments

• 
  markopolo777 3 weeks, 4 days ago

  good one,
  thank you !
• 
  fieromx 1 year, 4 months ago

  DJ Chronos is a good source for those ausio files one may need for animation projects, check it out, I did. :p