# Volume mutes after changing preset **URL:** \ **Category:** Quad Cortex\ **Created:** [October 10, 2023, 4:05am UTC](https://unity.neuraldsp.com/t/volume-mutes-after-changing-preset/12135 "2023-10-10T04:05:41Z")\ **Posts on this page:** 1\ **Showing post:** 29
**Author:** ![HonestOpinion](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/honestopinion/32/3398_2.png) [@HonestOpinion](https://unity.neuraldsp.com/u/HonestOpinion)\ **Post date:** [October 18, 2023, 7:39pm UTC](https://unity.neuraldsp.com/t/volume-mutes-after-changing-preset/12135/29 "2023-10-18T19:39:56Z")
As many users on the forum may already be aware of, there appears to be a problem with the 2.2.0 firmware’s interaction with the EXP 1 input jack’s auto-sensing. If you try to assign the ‘Bypass’ parameter while EXP 1 has anything plugged in, it causes a crash and reboot. I wonder if this is also what is impacting this bug regarding the preset not reflecting the volume level it was saved at after multiple preset switches. I don’t have a _two output/cable_ expression pedal to test with but for those who do, I am wondering if reversing the cables on the EXP pedal so that it uses EXP 2 for the throw of the pedal, and EXP 1 (or the reverse) for bypass as well as reversing the EXP throw/bypass assignment for the preset might help. Has anyone tested this? One of the current workarounds for the crash/reboot issue if you are using a _single cable_ expression pedal, is to plug it into EXP 2 instead of EXP 1. Make sure to recalibrate and save on the I/O page. Does this also help with the volume at zero on preset change issue? I know this issue is a PITA, just hoping we can find a way around it until the hotfix arrives, especially for players who are gigging with the QC and need relief immediately. Link to workaround for the crash and reboot issue: > [@WORKAROUND: For crash and reboot when 'Bypass' is assigned to expression pedal - CoreOs 2.2.0](https://unity.neuraldsp.com/t/workaround-for-crash-and-reboot-when-bypass-is-assigned-to-expression-pedal-coreos-2-2-0/12203): > > There is a bug in the 2.2.0 firmware that causes a crash and reboot when you attempt to assign the ‘Bypass’ parameter (under the assignment section of the context menu - three dots) to an expression pedal. As you would, for example, to set up auto-engage in a preset. I found two workarounds until they address it (I hope, in the next firmware release). Workaround #1: If you are using an expression pedal on only one EXP jack, you can do this. Unplug your expression pedal from "EXP 1’ and use ‘EX… --- _[View the full topic](https://unity.neuraldsp.com/t/volume-mutes-after-changing-preset/12135)._