A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Yes, there is typo in current gradle file, which is fixed in next release. Build tools update requirements comes from gradle upgrade in 2017.3...
Did you use faceCamGetAudioPowerLevel or faceCamGetAudioPeakLevel?
It is not open source.
What iOS device you are using for testing? Can you check if this is a metal issue, and can you reproduce the behavior also with GLES.
This is most probably happening because of lower quality sample rate conversion (Read: Linear). In Everyplay you can use...
Until Everyplay update is released, please replace the proguard-project file in Everyplay folder with included file. This should fix your problems.