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Won't Fix
Votes
1
Found in
2019.4.39f1
2020.3.21f1
2021.3.0f1
2022.1.0a13
2022.2.0a13
2023.1.0a24
2023.2.0a1
Issue ID
UUM-397
Regression
Yes
Audio popping is heard when playing back a sound through Timeline and the Audio Playable Asset has "Loop" enabled
How to reproduce:
1. Open the user-submitted project
2. Open the scene "SampleScene" and enter Play mode (Assets/Scenes/SampleScene.unity)
3. In the Game view, press the button labeled "Loop, bug"
Expected result: A sound is played back properly
Actual result: A sound is played back with a popping glitch at the end
Reproducible with: 2019.4.25f1, 2019.4.32f1, 2020.3.21f1, 2021.1.27f1, 2021.2.0b17, 2022.1.0a13
Not reproducible with: 2019.4.24f1
Note: The button may need to be pressed up to 10 times to reproduce the issue
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Resolution Note:
The timing machinery that runs the timeline is not accurate enough to accommodate audio sequencing tasks that require full sample accuracy. Unfortunately looping a clip an exact amount of times falls into this category. We've tried to implement various workarounds to fix the issue described in this bug report, but none were satisfactory. The underlaying problem is that the timeline does all scheduling on the main thread which is not accurate.