LibiaHong

If you're still having issues with the Helix tuner, it might be worth trying an online alternative. I know you've mentioned electrical noise affecting your setup, so something browser-based like Tuner Hippo could be useful since it runs offline after the first load. It can handle a variety of instruments and tunings without needing any additional app or account setup. Might be a good backup solution if you're still troubleshooting your current gear.

I believe the best option is to open the tone in your account, check its editing options, and see if there's a way to update the gear used in it. If the gear is already part of a published tone, you may need to edit and republish it for the changes to show up. Hopefully Line 6 makes managing gear in existing tones a bit easier.

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.