# Doppler

**URL:** <https://qa.fmod.com/t/doppler/22450>\
**Category:** FMOD Studio\
**Created:** [December 24, 2024, 8:10am UTC](https://qa.fmod.com/t/doppler/22450 "2024-12-24T08:10:04Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![zsda159753](https://avatars.discourse-cdn.com/v4/letter/z/e5b9ba/32.png) [@zsda159753](https://qa.fmod.com/u/zsda159753)\
**Post date:** [December 24, 2024, 8:10am UTC](https://qa.fmod.com/t/doppler/22450/1 "2024-12-24T08:10:04Z")

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Hello teachers. I tried using the sandbox tool of FMOD to test the Doppler effect, but it didn’t take effect. May I ask if this effect can only be achieved in the game? I made a loop of racing engine sound and activated the Doppler effect switch, then placed the event near the listening area and quickly dragged it to simulate the car passing through the listener quickly, but there was no effect.

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**Author:** ![DrewKski0](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/drewkski0/32/1775_2.png) [@DrewKski0](https://qa.fmod.com/u/DrewKski0)\
**Post date:** [December 27, 2024, 7:41pm UTC](https://qa.fmod.com/t/doppler/22450/2 "2024-12-27T19:41:26Z")

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Unfortunately, in my experience, the sandbox doesn’t audition the doppler at all. It needs to be tested in-game.

Here’s another post explaining more: [FMOD Studio 1.10.09 Doppler Effect](https://qa.fmod.com/t/fmod-studio-1-10-09-doppler-effect/16425)

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**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\
**Post date:** [December 30, 2024, 12:19am UTC](https://qa.fmod.com/t/doppler/22450/3 "2024-12-30T00:19:55Z")

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Hi,

The Sandbox tool isn’t well-suited for testing the Doppler effect, as it can’t accurately simulate precise movements and velocities. For effective testing of the Doppler effect, using a game engine is preferable, just as [DrewKski0](https://qa.fmod.com/u/DrewKski0) suggested.

I can see this has already been added to our feature request list from our record, and I’ll add you to the list of people interested in it. Thank you for bringing this to our attention!

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**Author:** ![zsda159753](https://avatars.discourse-cdn.com/v4/letter/z/e5b9ba/32.png) [@zsda159753](https://qa.fmod.com/u/zsda159753)\
**Post date:** [December 30, 2024, 6:29am UTC](https://qa.fmod.com/t/doppler/22450/4 "2024-12-30T06:29:38Z")

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Understood, thank you for the replies from the two teachers.

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**Author:** ![Johanenglund](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Johanenglund](https://qa.fmod.com/u/Johanenglund)\
**Post date:** [December 30, 2024, 10:40am UTC](https://qa.fmod.com/t/doppler/22450/5 "2024-12-30T10:40:08Z")

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Maybe applicable: [Bending Sound - Doppler in FMOD](https://www.youtube.com/watch?v=Be7PNN9G1UM&ab_channel=NightOnMars)

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**Author:** ![zsda159753](https://avatars.discourse-cdn.com/v4/letter/z/e5b9ba/32.png) [@zsda159753](https://qa.fmod.com/u/zsda159753)\
**Post date:** [December 31, 2024, 2:44am UTC](https://qa.fmod.com/t/doppler/22450/6 "2024-12-31T02:44:35Z")

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Thanks for Sharing