# Doppler effect-how to? **URL:** \ **Category:** FMOD Studio\ **Created:** [January 18, 2021, 4:31pm UTC](https://qa.fmod.com/t/doppler-effect-how-to/16658 "2021-01-18T16:31:35Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Fahrenheit737](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/fahrenheit737/32/1943_2.png) [@Fahrenheit737](https://qa.fmod.com/u/Fahrenheit737)\ **Post date:** [January 18, 2021, 4:31pm UTC](https://qa.fmod.com/t/doppler-effect-how-to/16658/1 "2021-01-18T16:31:35Z")
hi, i’ve been working on FMOD soundpacks for X-Plane’s 747. i was trying to find the doppler effect to simulate a flyby but couldn’t find it. also, the simulators fmod version is in version 1.8 or something and i cant go more modern. can someone please tell me where the doppler option is? ---
**Author:** ![joseph](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/joseph/32/264_2.png) [@joseph](https://qa.fmod.com/u/joseph)\ **Post date:** [January 18, 2021, 11:44pm UTC](https://qa.fmod.com/t/doppler-effect-how-to/16658/2 "2021-01-18T23:44:29Z")
To enable Doppler for an FMOD Studio event, select the event in the event editor window’s events browser, then look in the bottom-right corner of the event editor window to find the event macros. If the event macros do not appear, it is because a track other than the master track is selected, so either deselect that all tracks or select the master track. In the event macros, you’ll see a button under the heading “Doppler.” Click on this button to toggle on or off the Doppler effect for the event. ---
**Author:** ![Fahrenheit737](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/fahrenheit737/32/1943_2.png) [@Fahrenheit737](https://qa.fmod.com/u/Fahrenheit737)\ **Post date:** [January 19, 2021, 3:55am UTC](https://qa.fmod.com/t/doppler-effect-how-to/16658/3 "2021-01-19T03:55:19Z")
sorry, im so blind. thank you so much!