# How to export a reverse sound?

**URL:** <https://qa.fmod.com/t/how-to-export-a-reverse-sound/13040>\
**Category:** FMOD Engine\
**Created:** [March 16, 2017, 3:19am UTC](https://qa.fmod.com/t/how-to-export-a-reverse-sound/13040 "2017-03-16T03:19:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![zxhvincent](https://avatars.discourse-cdn.com/v4/letter/z/f08c70/32.png) [@zxhvincent](https://qa.fmod.com/u/zxhvincent)\
**Post date:** [March 16, 2017, 3:19am UTC](https://qa.fmod.com/t/how-to-export-a-reverse-sound/13040/1 "2017-03-16T03:19:09Z")

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I use -frequency to implement a reverse effect.But there is no sound when I export to a .wav file.I guess the minus frequency is a playback feature that supported by FMOD.The audio file can not recognize a minus frequency audio.  
I thought a idea that reverse write the audio file, but I want some easy steps.Does anybody have some ideas?

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**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 20, 2017, 5:34am UTC](https://qa.fmod.com/t/how-to-export-a-reverse-sound/13040/2 "2017-03-20T05:34:48Z")

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FMOD Studio does not support using negative frequency to play audio files backwards.

It sounds like you’re attempting to produce audio files that can be used outside of a gaming context. I recommend you use a DAW such as Protools or Live to produce this kind of content; You will get better results when using a tool that’s designed for what you’re trying to do.