Slew distortion causes click when exporting

[yohannd1]

System Information

Linux core2 6.19.10-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 26 Mar 2026 19:20:28 +0000 x86_64 GNU/Linux

LMMS Version(s)

1.3.0-alpha.1.968+6f50f90 (Linux/x86_64, Qt 5.15.18, GCC 15.2.1 20260209)

Most Recent Working Version

No response

Bug Summary

Exporting a song in which slew distortion is used with a non-centered "Bias" value causes audible clicks at the start.

Workarounds attempted which did not work:

• changing the value of "Keep effects running even without input";
• disabling "DC remover" in the plugin UI;
• reloading LMMS and exporting the track without playing - this one works sometimes, though that isn't the case for the minimum reproducible project I'm sending here;

Expected Behaviour

The clicks should not be present.

Steps To Reproduce

1. Open the minimum reproducible project.
2. Export it to a file.
3. After exporting, a click will be heard, and upon opening the exported file another click will be present at the start.

Logs

Here are the exported files. I exported it twice - in both cases there was a click at the start, but they sound different.

exp1.mp3
exp2.mp3

Screenshots / Minimum Reproducible Project

Minimum reproducible project (zipped because github was complaining)

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• I have searched all existing issues and confirmed that this is not a duplicate.