# No-sound mode in iphone
**URL:** https://qa.fmod.com/t/no-sound-mode-in-iphone/15469
**Category:** Unity
**Created:** [February 18, 2020, 1:54am UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469 "2020-02-18T01:54:41Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@AbelChiu](https://qa.fmod.com/u/AbelChiu)
#### Post date: [February 18, 2020, 1:54am UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469/1 "2020-02-18T01:54:41Z")
When I init fmod in my phone(iphone8 12.4.1), I got error “[FMOD] Studio::System::initialize returned ERR\_OUTPUT\_INIT,defaulting to no-sound mode”
How to solve this issure?
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### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [February 25, 2020, 3:41am UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469/2 "2020-02-25T03:41:10Z")
What versions of FMOD and Unity are you using?
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### Author:  [@AbelChiu](https://qa.fmod.com/u/AbelChiu)
#### Post date: [February 26, 2020, 6:32am UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469/3 "2020-02-26T06:32:53Z")
1.10.11
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### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [February 26, 2020, 10:05pm UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469/4 "2020-02-26T22:05:57Z")
Have you disabled the built in Unity audio?
[https://www.fmod.com/resources/documentation-unity?version=2.0&page=troubleshooting.html#disabling-unity-inbuilt-audio](https://www.fmod.com/resources/documentation-unity?version=2.0&page=troubleshooting.html#disabling-unity-inbuilt-audio)
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### Author:  [@AbelChiu](https://qa.fmod.com/u/AbelChiu)
#### Post date: [March 6, 2020, 2:06am UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469/5 "2020-03-06T02:06:14Z")
if I disabled the Built in Unity Audio
my Video will not sound!!
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### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [March 9, 2020, 10:54pm UTC](https://qa.fmod.com/t/no-sound-mode-in-iphone/15469/6 "2020-03-09T22:54:25Z")
Are you able to test with the FMOD logging library to see if it provides any more information?
you may need the information on these pages to enable it:
[https://fmod.com/resources/documentation-unity?version=2.0&page=platform-specifics.html](https://fmod.com/resources/documentation-unity?version=2.0&page=platform-specifics.html)
[https://fmod.com/resources/documentation-unity?version=2.0&page=troubleshooting.html#logging](https://fmod.com/resources/documentation-unity?version=2.0&page=troubleshooting.html#logging)