Schmalle

https://ph.element14.com/xp-power/ecs65us12/power-supply-ac-dc-medical-12v/dp/1821421 https://line6.com/support/topic/66140-helix-floor-internal-psu-blown-replacement-help-solved/#comment-520474

TLDR, I just wanted to contribute one little known fact to this: Yamaha bought Line 6 in late 2013.

My bad. I was sure it was called Return Level in the Global Settings. But actually it's called Send/ReturnL and Send/ReturnR. Btw: I've repeatedly asked for a "separate Send and Return Level parameters" feature in a future update. Combined Send/Return level pairs (the status quo) can be a limitation in a lot of use cases (4CM with amps, Tonex in the loop etc). Sends and Returns should be treated independently.

True, hence my post. You need to specify the INST setting, otherwise people (with their unit set to LINE) read your post and wonder why their patch is not at all unity gain.

That statement can be very misleading. Consider this scenario: 4CM with guitar -> HX input and HX send -> Amp input 4CM patch with default FX loop block INST as Input Level LINE as Return Level (aka FX loop level) Result: substantially boosted input of the amp, nowhere near unity gain. Solution: set Return Level to INST or -if you need more headroom- use LINE and decrease the FX loop Send parameter to -8dB (value from memory, not exactly sure). More headroom automatically means more noise.

1) Besides the input impedance there is an input gate in the input block. Disable it when you compare the effect of rolling back the guitar's volume pot. 2) If you want unity gain in your 4CM patch (which means the amp's input receives the same level that it would get without HX in the chain) set Input Level, Send/Return and Output Level to INST in Global Settings > Ins/Outs. Use default FX loop block settings in your 4CM patch and crank the VOLUME knob. 3) Here is how you A/B test the actual impact of the HX Stomp to the sound of your amp: HX Stomp has an analog bypass (aka true bypass) that you can use to compare the impact that the HX has when switched in. To do this right you need to do the following steps: create an empty patch double check that the input block and output block settings are default settings set Input Level and Output Level to INST in Global Settings > Ins/Outs set Global Settings > Preferences > Bypass Type to Analog set Global Settings > Preferences > Tap Function to AllBypass crank the (physical) VOLUME knob use a short cable between HX Out and the amp's input Now you can compare the actual impact of the HX Stomp to the sound of your amp toggeling between Analog Bypass and the empty patch using the Tap footswitch in Stomp Mode. 4) HAVE FUN!

There is no default "bypass all" switch / option. You could use snapshots and set up one snapshot with all blocks bypassed. You can do that in Stomp Mode with Command Center.

In Stomp Mode you can program each footswitch. Use Command Center to set up the footswitches to recall the snapshots you need.

I'd suggest to contact support and ask them.

To clarify: those two signal paths are completely separate? You can toggle paths using Controller Assign on fitting level parameters in each path with the same footswitch. I.e. a level parameter in path A is on (0 dB) while another in path B is off (-60 or -120 dB). Or you put a Gain block in each path set at -120 dB and Bypass Assign them to the same footswitch. One gain block is bypassed while the other is active.

No. It should be very easy to fix this for Line6 though. Open a support ticket , tell them that you can't accomplish this right now and hope that they add this in a future update.

This switch inverter device would be used between Helix' Ext Amp and the amp's channel switching socket. It would not be in the (audio) signal chain.

Helix' Ext Amp switching is transistor based - no relay used. This kind of topology is called an open collector switch. Again: The most efficient way to invert the switching is to put it in the firmware - a blind spot on Line 6's side. I don't know a commercially available device that does exactly what you want. The next best thing that comes to mind is probably a midi switcher. If I'd build a device like that it would be based around a transistor (BC547, BC548, 2N2222...) to invert the switching. Here is what would be needed for one switching channel: two resistors (R1=10k Ohm pullup, R2=4.7k Ohm base resistor) a diode or two to protect the transistor an external power supply input socket two 1/4" sockets (in and out) a case some wire soldering iron circuit board (optional) Disclaimer: I just own a Stomp that has no Ext Amp out. I can't test this on my own.

You've hit a blind spot in HX functionality and won't be able to achieve your goal without added electronics. Open a support ticket and ask them something like: That's worth a shot.

It's true that there is no specialized power amp block. Bummer, right? - Kind of, but probably not really: There are many amps with power amps. Some of the amp models come with a very simple preamp section. You may use that fact to achieve your goal. Try the A30 Fawn Normal or the Tweed Blues Normal. As a rule of thumb start with Bass and Treble to zero and Mids to 10 (if it has a mid control). Why? - Because most amp's tone controls produce a mid cut when everything is set to noon and we want a neutral sound from it. Another approach: Compare the activated amp model (that you use for power amp sim) with the bypassed one. Try to dial it in so that it as neutral as possible to get a feel for the amp and to get a good starting point. Obviously you need to start with the question: What do I want to achieve with this power amp simulation? Saturation? Power amp sag / compression? A different frequency spectrum?

The underlying assumption here is that they modeled the same Deluxe Reverb specimen twice. I highly doubt that and would bet money that these are different Deluxes.

It's a hardware problem of the rotary encoder. Contact cleaner can fix it (at least temporarily). Replacing the encoders can and has been done by members in this forum.

If it is not an external noise source: Maybe the internal power supply started to whine? Could be a bad capacitor or a coil/transformer vibration. Contact support! It would be nice if you report back and tell us the cause for future users.

Well, I read your OP differently. That lowers the probability of it being a no-ground issue. Does your Helix produce this sound without a guitar connected? Or do you have to connect a guitar and open up the guitar's volume for it to occur? - if so - does it change in intensity with the guitar's position in the room? The noise source might be a noise emitting device in the room. So does this occur in a different room?

Ok. Usually this kind of noise can be picked up if there is either no ground connection or more than one (ground loop). We can exclude a ground loop based on your description. The fact that it goes away if the Helix is plugged into a (grounded) amp points to a missing ground connection. Helix is grounded by the power cable which might be defective - so try a different power cable. It could also be an ungrounded power outlet. So try it in a different room.

Which Helix is it? Floor, LT, Stomp?

@mautejIt probably doesn't add latency, because in true spillover mode the DSP's are working one for the current preset and one for the preset that is loading. It's like having two HX Stomps in parallel where only one is providing signal. There is no DSP chaining like in a Path A -> Path B configuration, so I suspect no added latency. I don't have a Helix so I can't verify this with measured data. That said the increase in latency of a two path patch is marginal (a fraction of a millisecond) and shouldn't be an issue.

Setting Global Settings > Footswitches > Stomp Mode to 6 Switch gives you all 6 switches to program in Stomp Mode only (hence the name). Set the Snapshot Command's Press parameter to the snapshot you want to navigate to (instead of Next).

It has to be programed per preset (aka patch). There is no global mode that does what you specified.

Set Global Settings > Footswitches > Stomp Mode to 6 Switch. Use Stomp Mode. Program the three footswitches by assigning each with a Snapshot Command (1, 2, 3) using Command Center. This has to be done per patch.