I have crash log

Unity
1

[FMOD] OutputWASAPI::mixerThread : Starvation detected in WASAPI output buffer!
UnityEngine.StackTraceUtility:ExtractStackTrace ()
UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[])
UnityEngine.Logger:Log (UnityEngine.LogType,object)
UnityEngine.Debug:LogWarning (object)
FMODUnity.RuntimeManager:DEBUG_CALLBACK (FMOD.DEBUG_FLAGS,intptr,int,intptr,intptr) (at Assets/Plugins/FMOD/src/Runtime/RuntimeManager.cs:61)

(Filename: Assets/Plugins/FMOD/src/Runtime/RuntimeManager.cs Line: 61)

2

This warning is usually a symptom of high CPU usage, for example, creating and destroying many event instances every frame. You can try connecting the FMOD Profiler to determine which events are hogging resources.
What version of FMOD and Unity are you using and how often is this crash occurring?