Schmalle

The Euclidean Delay is made for a sequence of equally leveled repeats. Read the description of what Steps, Fill and Rotate do - once you get what it does you can create any repeating pattern. It can serve as the base in a parallel path that you can modulate with what you need.

Start with the Helix' full amp models (not preamps, no cab) using AMPED 1 as a neutral power amp (with VOICE set to FLAT and RESPONSE set to LINEAR).

Export the patch in question with HX Edit. Then attach it to a message in this thread.

Besides @rd2rk 's advice you could post the patch - I'd have a look at it.

True.

Maxed out DSP on the preset?

The switch is not directly compatible with the HX FX. That's why it's not listed as a compatible device. But you can probably use a hack to use the Toe Switch as a fake expression pedal with only two states (open / close) to switch stuff (EDIT: only momentary): For this the EX2's Toe Switch Out with HX FX's EXT 2 In. BUT: a 10k Ohm resistor needs to be added in parallel. This can be done by modding a TS cable where you open one plug and solder said resistor between tip and sleeve. Have fun!

Test the components: What happens when you only change the Tone King's channel via MIDI? What happens when you only change HX's patch via MIDI?

Try the Line 6 wall-ward power supply with your UA and ToneX pedal and listen whether the squeal is present in those configurations.

The manual is well written and tells you all about the Helix.

What do you mean by "patch button"? Footswitches in Preset Mode? - No. You can customize footswitch colors in Stomp Mode - look for a "Customize" option in Bypass Assign, Controller Assign or Command Center.

Maybe. Is one of the (former) footswitch contacts is at ground potential? To test this perform an electrical continuity test using a multimeter: Does it beep when probing one of these contacts against ground (sleeve contact on a cable in the input jack)? If not - it will probably not work. But if so: Connect that (former) footswitch contact to the sleeve contact on HX's Ext Amp socket and the other contact to tip or ring. That should work.

That is a nightmare scenario. In short: you experienced a catastrophic ground fault. Here is the "fast version" of how your gear probably was destroyed: 1. The Cause: A "Hot" Ground Either your wall outlet was wired incorrectly (e.g., Neutral and Ground were swapped) or the Helix had a major internal power supply failure. This caused the metal chassis of the Helix to carry full AC wall voltage instead of being a safe "0V" ground. 2. The Path: The USB Cable The moment you plugged in the USB cable, you created a bridge. That high-voltage current surged from the Helix, through the thin USB wires, and into your laptop to find a path to the earth. 3. The Result: Total Meltdown The Melted Ports: USB cables are designed for 5V not 120V (240V). The wires acted like a heating element in a toaster, melting the plastic and arcing. What to do now: Test the Outlet: Buy a $10 outlet tester. If it shows a wiring fault, your landlord or an electrician needs to fix it before you plug in anything else. Contact Line 6: Tell them the unit "back-fed voltage through the USB." They may want to investigate such a dangerous failure. Insurance: This is often covered under "Electrical Surge" in renters' or homeowners' insurance.

Deactivate TX MIDI Clock.

What amp do you have and what preamp model do you want to use with it? Maybe we can figure out how to make it sound awesome ;)