Line6 HX Stomp + Logic Pro: Signal not going through

[Kosmonopol_JJ]

Hi there everyone,

I’ve encountered following issue and I’m a bit desperate of my options. My overall feeling is as if there was a super-narrow-band compressor was set up but that’s not the case of course.

 

HW SETUP:

• El. Guitar
  • Jack-Jack cable
    • Line6 HX Stomp
      • Dedicated USB Cable
        • USB Hub
          • Mac (Logic Pro)
            • OUTPUT: External headphones (plugged into the Mac)

 

Logic Pro (11.0.1) SETUP:

Core Audio: Enabled/Disabled (Doesn’t affect the issue)

Input: HX Stomp

Output: External Headphones

I/O Buffer size: 32/128 Samples (I tried all options, doesn’t affect the issue at all).

 

CHRONOLOGY OF EVENTS:

1. I open Logic Pro - Guitar is connected as per above setup
2. I create a new Project or open an existing one
3. I create/choose existing audio (guitar/bass) track
4. I set the input monitoring to hear the sound as I play

 

ISSUE OCCURANCE

1. I strum a chord to test the sound
2. The signal doesn’t go through at al at first.
3. When the strings keep vibrating for about two seconds, signal goes through for about 2 miliseconds, heavily distorted and weak, then cuts off.

 

WHERE IT OCCURS:

• It only occurs in Logic Pro
• It DOES NOT occur in GarageBand
• It DOES NOT occur when plugged to mix during live performance

 

TROUBLESHOOTING DONE:

• Of course I checked other guitars and cables (duh)
• I checked whatever I/O setup both on the device and in Logic.
• I checked all drivers/additionall Line6 SW for requirements
• I checked manuals:
  • https://line6.com/data/6/0a020a418962611d636e7c51b/application/pdf/HX%20Stomp%203.0%20Owner's%20Manual%20-%20Rev%20D%20-%20English%20.pdf
  • https://help.apple.com/pdf/logicpromac/en_US/logic-pro-mac-user-guide.pdf
• I checked tutorial videos for LogicPro Setup:
  • https://youtu.be/7QQN_UFVpbk?si=5EjCNcvVh-wWbzcm
  • https://youtu.be/TNrx8RKEe5M?si=R1DXtR65Aqqa_1Cq
  • https://youtu.be/sGuWLPyI5Dg?si=oMsVwdjYnfO5O74e
  • https://youtu.be/3wwUVlxIwa0?si=HffBZ0dbL_iwxRrL
• I checked potentially related forums:
  • https://line6.com/support/topic/65761-issues-recording-with-hx-stomp-in-logic/
  • https://www.reddit.com/r/LogicPro/comments/121eq6b/hx_stomp_w_logic_pro_issue/

 

SUMMARY:

• Manuals and video tutorials do not address the issue at all. Basically all the materials only state it should all work in plug&play. Line6 manual even explicitly mentions this.
• The forums on Line6 mention issues using different setups and the forum on Reddit doesn’t address isn’t followed up.
• Given the properties of the issue I’m sure this is a matter of LogicPro I/O setup but I haven’t been able to figure out what exactly could it be.

 

Can anybody help/advise?