# Pitch issues with 3D sounds

**URL:** <https://qa.fmod.com/t/pitch-issues-with-3d-sounds/16002>\
**Category:** FMOD Engine\
**Created:** [July 23, 2020, 6:14am UTC](https://qa.fmod.com/t/pitch-issues-with-3d-sounds/16002 "2020-07-23T06:14:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![LemonTree](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@LemonTree](https://qa.fmod.com/u/LemonTree)\
**Post date:** [July 23, 2020, 6:14am UTC](https://qa.fmod.com/t/pitch-issues-with-3d-sounds/16002/1 "2020-07-23T06:14:16Z")

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hi mathew  
I had a strange problem with my project，When playing the same 3D sound effect in different positions at the same time, the audio is always high pitched. Why does it have this phenomenon？How can I avoid it？

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**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:** [July 23, 2020, 11:49pm UTC](https://qa.fmod.com/t/pitch-issues-with-3d-sounds/16002/2 "2020-07-23T23:49:21Z")

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Is it possible you’re setting values for the velocity of the Sound or Listener?  
This may be causing a doppler effect.

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<div class="post-metadata">

**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:** [August 20, 2020, 5:23am UTC](https://qa.fmod.com/t/pitch-issues-with-3d-sounds/16002/3 "2020-08-20T05:23:33Z")

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A post was split to a new topic: [When to flush stream buffer with loop points](https://qa.fmod.com/t/when-to-flush-stream-buffer-with-loop-points/16098)