# Changing Expression Pedal behavior? (Latch Simulation)

**URL:** <https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796>\
**Category:** Quad Cortex\
**Created:** [July 3, 2025, 9:01pm UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796 "2025-07-03T21:01:52Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Slaminski](https://avatars.discourse-cdn.com/v4/letter/s/8baadc/32.png) [@Slaminski](https://unity.neuraldsp.com/u/Slaminski)\
**Post date:** [July 3, 2025, 9:01pm UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796/1 "2025-07-03T21:01:52Z")

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When I use my Expression Pedal (M-Audio EX-P) I use the Latch Simulation to turn on / off effects. The only problem is, that it happens when my foot is on the heel. Is there a way to change it to Toe position?

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**Author:** ![aoloso](https://avatars.discourse-cdn.com/v4/letter/a/dec6dc/32.png) [@aoloso](https://unity.neuraldsp.com/u/aoloso)\
**Post date:** [July 4, 2025, 11:48am UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796/2 "2025-07-04T11:48:16Z")

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There’s a button next to the Dropdown on the Expression Settings Menu, if you click it, it will revert the heel/toe activation. ( i think it was the “invert range” button or something)

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<div class="post-metadata">

**Author:** ![Slaminski](https://avatars.discourse-cdn.com/v4/letter/s/8baadc/32.png) [@Slaminski](https://unity.neuraldsp.com/u/Slaminski)\
**Post date:** [July 5, 2025, 1:18pm UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796/3 "2025-07-05T13:18:59Z")

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I’ve tried it but it doesn’t work. The switch only turn on / off the effects. But still the expression pedal will react when I’m in Heel position.

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<div class="post-metadata">

**Author:** ![xush](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/xush/32/5100_2.png) [@xush](https://unity.neuraldsp.com/u/xush)\
**Post date:** [July 5, 2025, 5:38pm UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796/4 "2025-07-05T17:38:02Z")

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> [@Slaminski](#):
>
> M-Audio EX-P

have you flipped the polarity switch on the bottom of the pedal?

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<div class="post-metadata">

**Author:** ![Slaminski](https://avatars.discourse-cdn.com/v4/letter/s/8baadc/32.png) [@Slaminski](https://unity.neuraldsp.com/u/Slaminski)\
**Post date:** [July 6, 2025, 2:37am UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796/5 "2025-07-06T02:37:47Z")

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Yes, I also tried that. The expression pedal works fine for the rest, just the toggle behaves on the heel position is the “problem”.

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<div class="post-metadata">

**Author:** ![xush](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/xush/32/5100_2.png) [@xush](https://unity.neuraldsp.com/u/xush)\
**Post date:** [July 6, 2025, 2:57am UTC](https://unity.neuraldsp.com/t/changing-expression-pedal-behavior-latch-simulation/18796/6 "2025-07-06T02:57:17Z")

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Are you trying to use a toe-switch to toggle an effect’s bypass state?