have same issue in 5.3.4, why it's marked fixed?

I'm getting this error in the editor (v5.3.3f1).
using AssetBundles for WebGL

Error: Cannot create FMOD::Sound instance for resource archive:/CAB-7396a24aa3b7ccf374fb7342675317c6/CAB-7396a24aa3b7ccf374fb7342675317c6.resource, (Unsupported file or audio format. )
UnityEngine.AssetBundle:LoadAllAssets()
<descargarBundles>c__Iterator1:MoveNext() (at Assets/Scripts/AdminAssetBundle.cs:63)

> Before Unity 5.3, the OBB download started correctly using the Unity OBB Downloader plugin.
> Now, the game stays on infinite loading on the Splashcreen,
> never calls the OBB plugin to download missing data, and this error occurs.

I have the same issue in Unity 5.3.3f1, when splitting Android build to apk + obb:

Error: Cannot create FMOD::Sound instance for resource sharedassets0.resource, (File not found. )
Function SoundHandle::Instance::~Instance() may only be called from main thread!
Unhandled Exception: System.ExecutionEngineException: SIGILL

I'm still getting this problem on Unity 5.3.2f1, along with "(Operation could not be performed because specified sound/DSP connection is not ready. )". Is there a known workaround for this issue?

Still happening. It fives the "Cannot create FMOD::Sound instance for resource (null)" error in the editor, but the build crash at this point:
Receiving unhandled NULL exception
Obtained 29 stack frames.
#0 0x00000100f8cac1 in BaseVideoTexture::InitVideoMemory(int, int)
#1 0x00000100f8b203 in MovieTexture::ReadyToPlay()
(…)

Scrap that - somehow NET profile got set to "2.0 subset" changing it to "2.0" within unity player settings fixed the problem for me.

I'm still getting this error on ios builds for 5.3.3, is anyone else still getting it or was there a resolution ?

This is not fixed. In Unity 5.3.2f1, I get it on Android, if:
- Split application binary is enabled
- Delete .obb file from device
- Launch the game

Before Unity 5.3, the OBB download started correctly using the Unity OBB Downloader plugin. Now, the game stays on infinite loading on the Splashcreen, never calls the OBB plugin to download missing data, and this error occurs.

A huge problem for me :(

Thanks for fixing it.

This is still happening for us in Unity 5.3.1p1. Has been happening since we upgraded.

I'm getting this error in the editor (v5.3.2f1).

```
WWW www = new WWW (url);
clip = www.GetAudioClip(false, true);
clip.name = title;
```