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LaeusVR's avatar
LaeusVR
Honored Guest
10 years ago

major audio latency with Unity 4.6.9p3

I updated my project to 4.6.9p3 for legacy integration 0.8.0.0, and all of my game's sound effects now play with several hundred milliseconds of latency on an S6 Gear VR. Naturally, this breaks the immersion of the game. Looking at the 4.6.9p3 patch notes, it looks like something called "fast path" was disabled for Gear VR audio in this patch release. What should I do to restore solid audio playback for my project?

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  • 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.
  • LaeusVR's avatar
    LaeusVR
    Honored Guest
    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.