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Fixed in 2020.1.X

Fixed in 2018.4.X, 2019.3.X



Found in







Issue ID




AudioSource curve's last Keyframe position is set to maxDistance and the entire curve is streched when set through script



Steps to reproduce:
1. Open the attached project (
2. Select "Audio Source" in the Hierarchy
3. Scroll down in the Inspector and take note of the "Reverb Zone Mix" and "Low-Pass" curves
4. Enter Play Mode
5. Observe the change in the curves
6. Use Spacebar to move the last keyframe of each curve in negative X and negative Y direction

Expected result: Both of the curves overlap at Distance = 375 and continue to do so as the last keyframe is moved by repeatedly pressing Spacebar
Actual result: Low-Pass filter's curve's last Keyframe's time parameter is completely ignored and set to 1.0, which causes the entire curve to scale accordingly

Reproduced in: 2017.4.35f1, 2018.4.14f1, 2019.2.16f1 (Low-Pass only), 2019.3.0f2 (Low-Pass only), 2020.1.0a16 (Low-Pass only)

Note: In Unity 2017.4.35f1, 2018.4.14f1, the same behavior is observed for all built-in AudioSource distance function curves (Volume, Spatial Blend, etc.) along with the Low-Pass curve.

  1. Resolution Note (fix version 2020.1):

    Fixed in 2020.1.0a24

  2. Resolution Note (fix version 2019.3):

    Fixed in 2019.3.6f1

  3. Resolution Note (fix version 2018.4):

    Fixed in 2018.4.31f1

Comments (1)

  1. Spees

    Jul 08, 2020 08:25

    When is the fix for 2018 coming? It's been in review for months.

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