LibiaHong

Try recalibrating the expression pedal first, as that can sometimes fix the issue. Also, check the pedal assignment and make sure the minimum and maximum values are set correctly. If it still doesn't respond, test another compatible pedal or cable if possible to rule out a hardware problem.

This sounds really useful, especially for keeping preset volumes consistent when switching between tones live. Perceived loudness can vary quite a bit even when the meters show similar levels. It would be great if the tool could also help compare presets in a batch, so you can quickly spot which ones need a little adjustment.

I’d try forgetting the device in your Bluetooth settings and pairing it again, then check whether the volume issue happens with other devices too. Also, make sure the volume is turned up on both the phone and the Line 6 unit, since they may have separate volume controls. If it started after an update, checking the firmware version might help as well.

If you want to mute only the main output while keeping the other outputs active, check whether your device supports assigning a separate mute function or using an external mute switch on the main output path. The exact setup depends on which Line 6 unit you're using, so the model and current output routing would help narrow down the best solution.