# Unresolved External - OpenAL

**URL:** <https://forums.unrealengine.com/t/unresolved-external-openal/343032>\
**Category:** Audio\
**Tags:** microphone, unreal-engine, CPP, Blueprint, question\
**Created:** [January 4, 2016, 1:50am UTC](https://forums.unrealengine.com/t/unresolved-external-openal/343032 "2016-01-04T01:50:40Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Minus\_Kelvin](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/minus_kelvin/32/1124977_2.png) [@Minus\_Kelvin](https://forums.unrealengine.com/u/Minus_Kelvin)\
**Post date:** [January 8, 2016, 10:01pm UTC](https://forums.unrealengine.com/t/unresolved-external-openal/343032/2 "2016-01-08T22:01:42Z")

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That’s a linker error and there are a large number of things that can cause that so its a bit hard to debug without seeing your setup.

> <https://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix>

Most likely you’re not successfully linking to the OpenAL lib but are correctly including the include paths. In this case I’m going to guess its something related to trying to link to a 32 bit lib in 64 bit. You need to make sure you’re trying to load a compatible library.

Check out: [A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums](https://wiki.unrealengine.com/Linking_Static_Libraries_Using_The_Build_System)

If you haven’t yet, you should check out tutorials on how to link to 3rd party DLLs.

> **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)**
>
> After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from...

It’s probably going be easier to do this with a dynamic library vs a static library, and probably even better to do it as a plugin if you can.

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_[View the full topic](https://forums.unrealengine.com/t/unresolved-external-openal/343032)._