Steps to reproduce:
1. Open attached project
2. Go to Edit->Settings->Audio and make sure "DSP Buffer Size" is set to "Good latency" or "Best Latency"
3. Build and run for Android on specified device
4. Select "Test #1 Microphone Feedback" (Make sure to wear headphones, otherwise feedback loop will occur)
5. Allow the use of microphone and talk into phone, listen for output.
6. Output is garbled up, pitched down.

Expected: Audio output is supposed to just play back whatever you say as you said it, no effects added.
Actual: Voice comes out pitched down and non-continuous, with interruptions of silence

Devices Under Test:
Reproduced on:
Razer Razer Phone (Phone) GPU: Adreno (TM) 540 CPU: Snapdragon 835 MSM8998 OS: Android 8.1.0

Not Reproduced:
Xiaomi Mi 4i (Mi 4i), Adreno (TM) 405, Snapdragon 410 MSM8916, Android 5.0.2
Huawei P20 (EML-L29) Mali-G72 HiSilicon Kirin 970 Android 8.1.0
Xiaomi MI MAX (MI MAX) Adreno (TM) 510 Snapdragon 617 MSM8952 Android 7.0
Htc Desire 510 (HTC Desire 510) Adreno (TM) 306 Snapdragon 410 MSM8916 Android 4.4.3
Samsung Galaxy S8 (SM-G950U) Adreno (TM) 540 Snapdragon 835 MSM8998 Android 7.0
Samsung Galaxy J5(2016) (SM-J510FN) Adreno (TM) 306 Snapdragon 410 MSM8916 Android 7.1.1
Lge LG G4 (LG-H815) Adreno (TM) 418 Snapdragon 808 MSM8992 Android 6.0
Google Pixel 2 (Pixel 2) Adreno (TM) 540 Snapdragon 835 MSM8998 Android 8.1.0
Huawei Nexus 6P (Nexus 6P) Adreno (TM) 430 Snapdragon 810 MSM8994 Android 8.0.0
Xiaomi Mi 4i (Mi 4i) Adreno (TM) 405 Snapdragon 410 MSM8916 Android 5.0.2
Huawei P9 (EVA-L19) Mali-T880 HiSilicon Kirin 955 Android 7.0
Lenovo PHAB2 Pro (Lenovo PB2-690M) Adreno (TM) 510 Snapdragon 617 MSM8952 Android 6.0.1

Reproduced on Unity version:
2018.3.0b5, 2018.2.12f1, 2018.1.9f2

Version 2019.1.0a5 (de904b9ed9b4)
Mon, 08 Oct 2018 15:00:10 GMT
Branch: trunk

Version 2019.1.0a3 (6ee1d51b066d)
Sat, 22 Sep 2018 04:23:36 GMT
Branch: trunk