# How set wav filename in unity?
**URL:** https://qa.fmod.com/t/how-set-wav-filename-in-unity/15906
**Category:** Unity
**Created:** [June 21, 2020, 4:08pm UTC](https://qa.fmod.com/t/how-set-wav-filename-in-unity/15906 "2020-06-21T16:08:29Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@SilentAndroid](https://qa.fmod.com/u/SilentAndroid)
#### Post date: [June 21, 2020, 4:08pm UTC](https://qa.fmod.com/t/how-set-wav-filename-in-unity/15906/1 "2020-06-21T16:08:29Z")
Hello! Can somebody tell me how set wav file name in unity?
My code:
string s = “filename.wav”;
FMODUnity.RuntimeManager.CoreSystem.setOutput(FMOD.OUTPUTTYPE.WAVWRITER\_NRT);
FMODUnity.RuntimeManager.CoreSystem.init(128, FMOD.INITFLAGS.STREAM\_FROM\_UPDATE, System.Runtime.InteropServices.Marshal.StringToHGlobalAnsi(s));
Doesn’t work.
FMOD create file with default name - fmodoutput.wav
---
### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [June 29, 2020, 5:33am UTC](https://qa.fmod.com/t/how-set-wav-filename-in-unity/15906/2 "2020-06-29T05:33:10Z")
[https://fmod.com/resources/documentation-api?version=2.0&page=core-api-system.html#fmod\_outputtype\_wavwriter\_nrt](https://fmod.com/resources/documentation-api?version=2.0&page=core-api-system.html#fmod_outputtype_wavwriter_nrt)
> To pass information to the driver when initializing use the _extradriverdata_ parameter in [System::init](https://fmod.com/resources/documentation-api?version=2.0&page=core-api-system.html#system_init) for the following reasons:
>
> - [FMOD\_OUTPUTTYPE\_WAVWRITER](https://fmod.com/resources/documentation-api?version=2.0&page=core-api-system.html#fmod_outputtype_wavwriter) - const char\* file name that the wav writer will output to.
> - [FMOD\_OUTPUTTYPE\_WAVWRITER\_NRT](https://fmod.com/resources/documentation-api?version=2.0&page=core-api-system.html#fmod_outputtype_wavwriter_nrt) - const char\* file name that the wav writer will output to.