major audio latency with Unity 4.6.9p3

Unity 4.6.9p2 and earlier used the Android fast path to reduce audio latency from ~150ms to ~30ms. This is also the case in Unity 5. However, Unity 4's support for the fast path was problematic and there were artifacts such as hitching due to buffer underruns. The issue was present for quite a while and caused severe audio problems for many apps before Unity decided to remove fast path support in 4.6.9p3. If the fast path works well for your app, you are still free to use 4.6.9p2, which isn't that much different from 4.6.9p3. The artifacts were never reported under Unity 5, so the fast path is still active there. I would encourage anybody on Unity 4 to upgrade to Unity 5 as soon as possible.

It would seem v4 is now officially at the end of it's life.
http://blogs.unity3d.com/2015/12/17/fin ... unity-4-x/

Unity also just sent out an email on this.

Regards
James..

Thanks much guys, will switch down to 4.6.9p2.

I investigated switching to Unity 5 and ported my project to it, but its continuing issues with baked lighting (and previous issues with mobile performance, though it sounds like that has improved) made me push that off until my company's next project.