# Doppler Effect **URL:** \ **Category:** FMOD Studio\ **Created:** [February 22, 2014, 4:06pm UTC](https://qa.fmod.com/t/doppler-effect/11304 "2014-02-22T16:06:12Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![ninjam.nox](https://avatars.discourse-cdn.com/v4/letter/n/65b543/32.png) [@ninjam.nox](https://qa.fmod.com/u/ninjam.nox)\ **Post date:** [February 22, 2014, 4:06pm UTC](https://qa.fmod.com/t/doppler-effect/11304/1 "2014-02-22T16:06:12Z")
Hi all, I try to search in fmod studio manual how i can activated doppler effect on event but no info found about this. Could you please confirm if i can do in Fmod Studio ? Thank by advance ! ---
**Author:** ![brian\_zhao](https://avatars.discourse-cdn.com/v4/letter/b/b77776/32.png) [@brian\_zhao](https://qa.fmod.com/u/brian_zhao)\ **Post date:** [April 2, 2014, 2:37am UTC](https://qa.fmod.com/t/doppler-effect/11304/2 "2014-04-02T02:37:35Z")
> [@brett](#): > > Are you talking about scaling it? Its currently automatic based on how fast the listener and the object is moving in the game at runtime. i create a sound with some 3D efffects such as Distance, Direction and Elevation, do i hear doppler effect when i turn Distance control in FMOD Studio? ---
**Author:** ![m\_paramzin](https://avatars.discourse-cdn.com/v4/letter/m/3bc359/32.png) [@m\_paramzin](https://qa.fmod.com/u/m_paramzin)\ **Post date:** [March 3, 2014, 11:34am UTC](https://qa.fmod.com/t/doppler-effect/11304/3 "2014-03-03T11:34:01Z")
Same problem here! Is it any info about how to implement a Doppler effect using FMOD Studio? :roll: ---
**Author:** ![brett](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/brett/32/261_2.png) [@brett](https://qa.fmod.com/u/brett)\ **Post date:** [March 3, 2014, 11:42pm UTC](https://qa.fmod.com/t/doppler-effect/11304/4 "2014-03-03T23:42:54Z")
Are you talking about scaling it? Its currently automatic based on how fast the listener and the object is moving in the game at runtime. ---
**Author:** ![NS1](https://avatars.discourse-cdn.com/v4/letter/n/7ba0ec/32.png) [@NS1](https://qa.fmod.com/u/NS1)\ **Post date:** [September 25, 2014, 12:57pm UTC](https://qa.fmod.com/t/doppler-effect/11304/5 "2014-09-25T12:57:56Z")
Same problem : I can’t have any doppler effect, even when set at 500% ! ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [October 6, 2014, 12:48am UTC](https://qa.fmod.com/t/doppler-effect/11304/6 "2014-10-06T00:48:01Z")
For doppler to function you need to enable it in FMOD Studio for a particular event. At runtime you need to use EventInstance::set3DAttributes and ensure you specify a velocity. The default expected units are meters / meters per second. ---
**Author:** ![rvangaal](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/rvangaal/32/11_2.png) [@rvangaal](https://qa.fmod.com/u/rvangaal)\ **Post date:** [April 16, 2015, 12:37pm UTC](https://qa.fmod.com/t/doppler-effect/11304/7 "2015-04-16T12:37:59Z")
> [@](#): > > For doppler to function you need to enable it in FMOD Studio for a particular event. At runtime you need to use EventInstance::set3DAttributes and ensure you specify a velocity. The default expected units are meters / meters per second. Indeed that seems to be required, but where do you turn on Doppler in FMod Studio for an event? It seems you must do it in FMod Studio rather than runtime (I too have no Doppler for events, while they work with low-level sounds). ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [April 16, 2015, 9:59pm UTC](https://qa.fmod.com/t/doppler-effect/11304/8 "2015-04-16T21:59:06Z")
The doppler switch is in the event macros tab for each event, it allows you to turn it on or off. ---
**Author:** ![fractanimal](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/fractanimal/32/3897_2.png) [@fractanimal](https://qa.fmod.com/u/fractanimal)\ **Post date:** [March 22, 2022, 2:35am UTC](https://qa.fmod.com/t/doppler-effect/11304/9 "2022-03-22T02:35:54Z")
How would one go about creating the assets for this? For passing cars, is just a normal engine sound enough, with the doppler effect doing the rest? Or are approaching / retreating assets also necessary? ---
**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:** [March 22, 2022, 11:26pm UTC](https://qa.fmod.com/t/doppler-effect/11304/10 "2022-03-22T23:26:28Z")
> [@fractanimal](#): > > How would one go about creating the assets for this? > > For passing cars, is just a normal engine sound enough, with the doppler effect doing the rest? > > Or are approaching / retreating assets also necessary? Our Doppler effect is designed to work without requiring separate approaching/retreating assets, but is designed to produce realistic results. If you want an exaggerated Doppler effect, or for the sound of passing traffic to have additional quirks beyond that of simple Doppler, you will need to use other methods. ---
**Author:** ![fractanimal](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/fractanimal/32/3897_2.png) [@fractanimal](https://qa.fmod.com/u/fractanimal)\ **Post date:** [March 26, 2022, 2:21am UTC](https://qa.fmod.com/t/doppler-effect/11304/11 "2022-03-26T02:21:06Z")
Great, thanks joseph! ---
**Author:** ![fractanimal](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/fractanimal/32/3897_2.png) [@fractanimal](https://qa.fmod.com/u/fractanimal)\ **Post date:** [September 15, 2022, 10:42pm UTC](https://qa.fmod.com/t/doppler-effect/11304/12 "2022-09-15T22:42:20Z")
Also, there is the “Dopler Scale” knob. How does this impact the dopler exactly? If I set it to max (500% ) will that increase the impact of the dopler effect or scale the distance at which is works? ---
**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:** [September 16, 2022, 5:01am UTC](https://qa.fmod.com/t/doppler-effect/11304/13 "2022-09-16T05:01:19Z")
Setting Doppler scale to 500% means that the event will experience five times as much Doppler effect as it would experience if Doppler scale was set to 100%. Doppler effect is applied to the event at all ranges. If you want the Doppler effect to only apply at some ranges, you can automate the event’s Doppler scale property on a distance built-in parameter.