Verne-Bunsen Posted April 10, 2017 Share Posted April 10, 2017 Or, "How I Learned To Love the Auto-On". [edit for clarification: This procedure is specific to Helix's "EXP" inputs, as the Helix Floor has no "Toe Switch" input. Helix Rack and Helix Stomp are configured differently and the switch configuration described here will not yield the desired results....] A little background. While the on board expression pedal with toe switch is a great feature, the motion of the pedal was "off" for me as far as wah went. I wanted it to feel like a wah pedal and it just didn't move like one. So, I gutted a wah enclosure and turned it into an expression pedal following this thread: http://line6.com/support/topic/21821-modding-a-cry-baby-to-make-an-expression-pedal/?do=findComment&comment=169079 Correct feel: check. Separate foot switch to toggle it on and off: Lamesville... I had thought that the position based auto-on feature for expression pedals would be the be-all-end-all for me, but I couldn't ever get anything set up that worked for me. I always ended up with it switching off-on-off-on whilst rocking the wah. So I set about to find a way to make an external expression pedal with a toe switch work. The good news: it can be done. The bad news: it requires both of your external expression pedal jacks. Stuff you need: An expression pedal with a spot for a toe switch, a 3PDT switch (standard "true-bypass" style guitar pedal switch), a jack (not pictured, whoops! It's just a regular old mono guitar jack...) and a 10k resistor. In this case I used a 15k resistor because it's what I had in my parts bin, it's fine for this purpose. The Helix sees an open circuit as "No Pedal Present", a dead short from tip to sleeve as 0% on the expression pedal position, and 10k ohms between tip and sleeve as 100%. So what I want is for one position of the switch to jump straight from tip to sleeve and for the other position to put the resistor in the between. In a 3PDT switch the middle row of lugs is common and connects to the left or right row depending on the switch position. That makes it a pretty easy configuration to wire up: The black and white wires on the center row go to the jack tip and sleeve respectively, the black jumper on the left connects them directly in position 1 and the resistor on the right connects them with 15k ohms resistance in position 2. Again, 10k is spec for 100%, 15k still registers as 100%. Testing it on the meter: Looking good! Now testing it with Helix. For this I hooked it up to EXP2 and loaded a wah, then assigned both the position and bypass to it so that I could see it functioning. I set the bypass threshold at 20% (could be anything bigger than 0%, really) and no delay. What I want to see is OFF at position 0% and ON at position 100%. Frickin' sweet. Hook it up and stuff it in the enclosure. I marked the jacks externally so I'd remember which goes where.... I connected the switch to EXP2 and the Expression pot to EXP3, so by assigning bypass to EXP2 and position control to EXP3 I've got a toe-switchable external expression pedal! It works just like it should, I really like it. You can still use the expression pedal to control other things as long as you remember that if any of them are ON when you go to use the wah you'll be manipulating both of them. The only downside to this arrangement for me is that I've been running two external expression pedals, one of which was assigned to vibe with auto-on. Auto-on works wonderfully for that application. I can still use the external expression pedal to control it but I'll have to toggle it with a Helix footswitch. Nothings free.... Anyway, I hope someone finds this useful, or at least of interest! 1 2 Quote Link to comment Share on other sites More sharing options...
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