When the Sample Rate of the Audio Mixer or device is not 48kHz, the Biquad Filter output is not correct on PIE. It is Silent at 20000Hz, and other frequencies also sound wrong. See [Link Removed]
1) Open AudioQA in Editor
2) Locate the MSS_Test_BiquadFilter asset in the Content Browser and add it to the default level
3) Open the level Blueprint and add a Set Float Parameter node. Connect the Ambient Sound Actor in the level to the Target.
4) Set In Name to: Cutoff Frequency
5) Set the Cutoff Frequency to 20000
6) PIE and validate it works
7) Stop PIE. Open the Project Settings.
8) Select Windows and change the Audio Mixer Sample Rate to 32000
9) PIE again
Expected Result:
Sound plays at full volume
Actual Result:
Is silent
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-199323 in the post.
0 |
Component | UE - Audio - MetaSounds |
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Affects Versions | 5.3, 5.4 |
Target Fix | 5.4 |
Fix Commit | 29259197 |
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Created | Oct 30, 2023 |
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Resolved | Oct 31, 2023 |
Updated | Nov 6, 2023 |