# Audio cutting out in Unity 5.6
**URL:** https://qa.fmod.com/t/audio-cutting-out-in-unity-5-6/13402
**Category:** Unity
**Created:** [September 5, 2017, 5:59am UTC](https://qa.fmod.com/t/audio-cutting-out-in-unity-5-6/13402 "2017-09-05T05:59:28Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@aegisthegame](https://qa.fmod.com/u/aegisthegame)
#### Post date: [September 5, 2017, 5:59am UTC](https://qa.fmod.com/t/audio-cutting-out-in-unity-5-6/13402/1 "2017-09-05T05:59:28Z")
We were previously using Unity 5.5.3f1 with FMOD Unity plugin 1.09.07 without any issues. We actually exhibited our game at Gamescom last month, running our Mac/Win builds on several machines all day continuously for 4 days straight. However, after upgrading to Unity 5.6.2p4 our audio now becomes scratchy/static-y after ~1 hr of gameplay and increasingly cuts out until it’s almost inaudible after ~2 hrs of gameplay. I logged the cpu usage before exiting each scene and observed the dspusage and studiousage values increasing steadily over time. For example, here are some values I recorded after 2 hrs:
after 25s: dspusage 0.4428328, studiousage 0.1845792
49s: dspusage 1.087573, studiousage 0.1812567
9min: dspusage 15.94857, studiousage 8.91303
10min: dspusage 17.09911, studiousage 9.446562
…
45min: dspusage 62.84464, studiousage 42.00607
46min: dspusage 59.86729, studiousage 34.07656
56min: dspusage 62.15407, studiousage 41.4464
…
94min: dspusage 80.91753, studiousage 67.04572
95min: dspusage 84.5693, studiousage 47.51013
115min: dspusage 99.61926, studiousage 72.40491
We’re a bit stumped at what the issue could be - no major changes to our project other than the Unity upgrade and we release every event that we create. Has anyone else experienced this behavior with Unity 5.6? Any suggestions/workarounds?
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### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [September 12, 2017, 2:13am UTC](https://qa.fmod.com/t/audio-cutting-out-in-unity-5-6/13402/2 "2017-09-12T02:13:28Z")
This is due to a bug in the behavior of nested events with multi-sound instruments on a parameter and no sounds on the timeline.
This has been added to our tracker and will be fixed in a future release.