# Why was FMOD\_CALLBACK renamed to FMOD\_CALL with 2.03.xxx?

**URL:** <https://qa.fmod.com/t/why-was-fmod-callback-renamed-to-fmod-call-with-2-03-xxx/23285>\
**Category:** FMOD Engine\
**Created:** [August 28, 2025, 1:07pm UTC](https://qa.fmod.com/t/why-was-fmod-callback-renamed-to-fmod-call-with-2-03-xxx/23285 "2025-08-28T13:07:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![michaelhartung](https://avatars.discourse-cdn.com/v4/letter/m/8e7dd6/32.png) [@michaelhartung](https://qa.fmod.com/u/michaelhartung)\
**Post date:** [August 28, 2025, 1:07pm UTC](https://qa.fmod.com/t/why-was-fmod-callback-renamed-to-fmod-call-with-2-03-xxx/23285/1 "2025-08-28T13:07:08Z")

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On the surface this seems like a purely cosmetic change that I find difficult to justify given the knock on effects 🤔

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<div class="post-metadata">

**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:** [August 28, 2025, 11:20pm UTC](https://qa.fmod.com/t/why-was-fmod-callback-renamed-to-fmod-call-with-2-03-xxx/23285/2 "2025-08-28T23:20:14Z")

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This was introduced in a major version which will always have API changes, otherwise we will have a lot of technical debt to deal with as the API evolves.

F\_CALLBACK was being used for dsp state function pointers, which are not callbacks. see [https://www.fmod.com/docs/2.03/api/plugin-api-dsp.html#fmod\_dsp\_state\_functions](https://www.fmod.com/docs/2.03/api/plugin-api-dsp.html#fmod_dsp_state_functions)

It is more appropriate to call it CALL to represent the calling convention (stdcall etc) rather than use the actual incorrect term callback.

A simple search/replace all will usually fix it in a short amount of time. hopefully that gives you enough background information!

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<div class="post-metadata">

**Author:** ![michaelhartung](https://avatars.discourse-cdn.com/v4/letter/m/8e7dd6/32.png) [@michaelhartung](https://qa.fmod.com/u/michaelhartung)\
**Post date:** [September 9, 2025, 1:45pm UTC](https://qa.fmod.com/t/why-was-fmod-callback-renamed-to-fmod-call-with-2-03-xxx/23285/3 "2025-09-09T13:45:45Z")

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Thanks, that makes perfect sense of course.