# \#tb-303

**URL:** https://forums.syntaur.com/tag/tb-303/2058.md

[Latest](https://forums.syntaur.com/latest.md) · [Categories](https://forums.syntaur.com/categories.md) · [Tags](https://forums.syntaur.com/tags.md)

---

## [Roland TB303 env knob not tweaking](https://forums.syntaur.com/t/roland-tb303-env-knob-not-tweaking/9363)

<div class="topic-metadata">

**Author:** [@Ronito](https://forums.syntaur.com/u/Ronito)\
**Replies:** 3\
**Last updated:** [August 27, 2026, 11:27am UTC](https://forums.syntaur.com/t/roland-tb303-env-knob-not-tweaking/9363 "2026-08-27T11:27:05Z")

</div>

Hello Tweakers :smiley: I wonder if anybody can help with a diagnosis .. :wink: My Roland TB303’s envelope knob seems to have died, all other knobs tweaking but the env nothing. doesn’t seem to be the knob itself, cou…