# How to adjust the speed of the audio without changing the pitch?

**URL:** <https://qa.fmod.com/t/how-to-adjust-the-speed-of-the-audio-without-changing-the-pitch/20831>\
**Category:** FMOD Studio\
**Created:** [November 2, 2023, 11:08am UTC](https://qa.fmod.com/t/how-to-adjust-the-speed-of-the-audio-without-changing-the-pitch/20831 "2023-11-02T11:08:15Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![Leah\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/leah_fmod/32/3685_2.png) [@Leah\_FMOD](https://qa.fmod.com/u/Leah_FMOD)\
**Post date:** [November 10, 2023, 1:35am UTC](https://qa.fmod.com/t/how-to-adjust-the-speed-of-the-audio-without-changing-the-pitch/20831/7 "2023-11-10T01:35:55Z")

</div>

> [@MisakaCirno](#):
>
> But the source code for the pitch shifter doesn’t seem to be given in FMOD Engine, is this something that can’t be published? If it can’t be published, can you provide some information about the principle or algorithm of its implementation?

Unfortunately, I cannot provide you with the source code. However, the algorithm is based on a pitch shifting implementation by Stephan Bersnee. An article explaining the implementation can be found [here](http://blogs.zynaptiq.com/bernsee/pitch-shifting-using-the-ft/), and an example .cpp can be downloaded [here](http://blogs.zynaptiq.com/bernsee/download/).

---

_[View the full topic](https://qa.fmod.com/t/how-to-adjust-the-speed-of-the-audio-without-changing-the-pitch/20831)._