Schmalle

Ignore my post. What you have is already the right cable for the SP1-L6. It might be faulty though. Open it up the stereo plug (=TRS: tip, ring, sleeve) and check whether the tip and ring cables are in danger of having (unwanted) contact.

To test whether the problem still occurs without MIDI: Bypass Assign the delay to an onboard footswitch and add the feedback parameter via Controller Assign. Test for latency.

There are some effects parameters that have a ramp time. Can you post the preset that is choking?

Make sure to use a TRS cable.

After you did the MIDI monitor investigation mentioned above: report back and we can go on narrowing down the problem.

MIDI is a standard protocol. If both units 'speak' MIDI (which they do) then they are compatible. Is the cabling like this: Helix MIDI Out -> Control Switcher MIDI In? Is the MIDI cable ok? Test Helix sending MIDI CC messages: You can hook up the Helix to a computer via USB and check whether it sends the right CC messages using a DAW or a MIDI monitor e.g. MIDIView. Make sure Global Settings -> MIDI/Tempo -> USB MIDI is engaged for that. If you see it sending MIDI messages via USB it also sends it via MIDI OUT. Or even better use another MIDI-USB interface and connect the Helix to it via MIDI and then use a MIDI monitor program on a computer.

Guitar speakers are not full range speakers and their high end response is significantly tamed beyond about 5kHz. Take a look at the frequency response chart of a Celestion V30 to see for yourself.

Don't know but here is what you can do to narrow down the problem: You could record the MIDI IN messages via USB using a DAW to test when the messages come in (the duration between two sent CC messages) and whether there is other stuff that is going on. You could simultaneously record an audio track to measure the actual reaction delay time. Hope that helps.

Control Switcher: 1. Factory Reset Apply power while holding down both buttons #2 and #3. LED #1 will be on. Press button #1. Press buttons #2, #3 and #4 as each LED comes on. LEDs will blink and then stay on. Remove power. 2. Enable CC message control Apply power while holding down button #3. LED #3 will flash until you release the button. Press buttons #1 and #2 so that #1 is OFF and #2 is ON. Remove power when finished. You can now send CC messages #80-83 to control the four loops. Helix: Set Global Settings -> MIDI/ Tempo -> MIDI Base Channel to 1. Test CC function: In Command Center set a footswitch to CC Toggle, Base, 80, 0, 127, Latching . Use the footswitch to test whether switch #1 on the Control Switcher reacts. If it works check the other switches,too: replace 80 with 81, 82, 83 in the CC Toggle command's CC # parameter. Remove footswitch CC Toggle again (set it to None). Now your good to use Instant Commands to send MIDI CC messages #80-83 per snapshot.

The EVH 5150III 100W head manual does not mention MIDI. So no direct MIDI switching. You'd need a device that translates MIDI to those Peavey footswitch signals. This cable or a similar one in combination with a relay switcher like the Voodoo labs Control Switcher MIDI Amp Commander and others should do the job. Ask Peavey support to make sure.

The AC30's overdrive comes from it's power amp. You won't get overdrive from the preamp unless you hit it hard with a boost - it is just one tube stage and a bit of filtering. The overdrive happens after the preamp in the phase inverter and the power tubes. You could try the Carillon preamp for this. The best preamp imho is the Cali Texas CH2 - very versatile. Give it a try!

That's a nice suggestion. The Deluxe Comp is great for that. Ratio 10:1, Attack 0.1ms, Release 200ms, Mix 50% seems a starting point to me.

You can output the signal for the amp on the left channel and a cabinet emulation for FOH on the right channel: put an IR or Cab block last in the signal chain move it to Path B (action button) in the mixer block (circle symbol) pan A hard left and B hard right You'd need to find a cab sim / IR that matches the sound coming from your cab. And be aware of the fact that i.e. the presence and depth control on the amp is usually after the FX loop - hence they will not affect the signal to FOH. I hope i was clear. ;)

@Dubuyu Why is upwards compression desirable to you? What are you trying to achieve?

Disable Global Settings -> MIDI/Tempo -> Snapshot CC Send. If enabled Helix sends #CC 69 messages which the Big Sky recognizes as Plate low end parameter changes.

I bought four short TRS male -> XLR male cables as adapters to connect to XLR cables leading to PA. On two of them I opened up the TRS plug and cut the ground. I marked these as "GND lift". Works, no complaints.

This is true.

Regarding DSP power you can think of it as having two HX Stomps in one box.

Try a compressor with mix parameter - start with 0% mix and then increase. That will add sustain and body while maintaining the acoustic guitar's transients. The Ampeg Opto Comp is my fav for that.

It can be a head scratcher for sure. Disabling Snapshot Bypass means disabling the snapshots' control over the block's bypass.

There is another way, too. You can use only Path A and a FX Loop block as a separator between instrument processing: In -> processing for Instr 1 -> FX Loop (100% mix) -> processing for Instr 2 -> Out Instr 1 plugged into Input 1, processed signal from Send. Instr 2 plugged into Return, processed signal from Out. This requires using an FX Loop block (and therefore unnecessary DSP usage) but it frees you to use Path B for parallel FX in the patch.

No, the Stomp has Path A and B which are both stereo paths. If you use a Stereo Return block as the first block in Path B and route it to Send you can have two fully stereo paths from input to output

Yes this can be done on the Stomp. You use L and R inputs for the two instruments - lets call those instruments Ren and Stimpy. In the patch you use Split Y (panned hard L/R) to separate Ren and Stimpy: Ren on path A, Stimpy on path B. You can now process both instruments individually. You can then merge both paths again (using the Merge block panned hard L/R) and output Ren on out L and Stimpy on out R. Alternatively you use the Send as a stereo out for Stimpy and outs L/R for Ren.

You can use an impedance balanced TRS out with either TS or TRS cables. If the device you're connecting it with has a balanced input (e.g. mixer) then a TS cable works but a TRS cable is preferable as it gives you the noise suppression and optional ground lift (by taking advantage of the third/ring lead). If the device you're connecting it with has a unbalanced input (e.g. amp) then both TS and TRS cables do the same work (TRS cable works but has no advantage because the third/ring lead is connected to ground /deactivated).

From your description it's hard to determine the problem. The detune artifacts might be caused by a time parameter (delay, pre delay or something similar) that is changed via snapshot. You could post the patch (attachment) to let us see what is going on there. You could also do a test and bypass or delete all effects and listen whether the problem remains.