Home › Forums › Products › Stompboxes › Help with Space and expression pedal to control input of wet signal
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audio.ole.
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May 3, 2026 at 10:40 am #195295
Hi there,
I would like to be able to control amount of input signal going into fx with an expression pedal, in a context of a mono signal inside a pedal board ( one input, one output). It should be independent of dry/wet mix.
The only ways I have found is to use Space in a fx loop, with expression controlling input signal, or using routing wet/dry mode with 2 outputs, but how can I achieve this in a mono chain ?For now I have a workaround : to use Dualverb algorithm with A as a dry signal (no decay, no predelay) and B as a wet signal, and expression controlling A/B mix, but A will never be a completely dry signal, and it’s not possible with others algorithms .
Am I missing something ? Any help will be precious.
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May 4, 2026 at 7:35 am #195300
Without suggesting that the following is the final word on the subject (I hope it’s not. I hope someone proves me wrong), I think you understand things correctly.
Maybe 4 years ago I set out to find all the ways to create “pseudo-spillover” with the H9 (which does not have real spillover). The trick was to find a way to throttle the input to the effect (most of the mix controls manipulate the effect output, not the input) . In Space, all I could find was the A/B mix control in DualVerb just as you mention.
I also found this ability in H9 algos UltraTap and in PitchFuzz. FWIW I have attached H9 preset images for those. In PitchFuzz, I feel like I’m trying to outsmart the algo to pull this off. By contrast, I feel that UltraTap is the best H9 algo for this b/c this feature appears to be specifically/intentionally included in the algo. I have also attached an UltraTap flow chart showing why: the Chopper can be controlled by an expression pedal upstream of the Taps Engine. Other than in DualVerb, I’m not aware of any Space algo that does anything similar to this.
Hope that helps.
~TonyAttachments:
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May 4, 2026 at 2:30 pm #195307
That is such a pity that we can’t use expression pedal this way. Could we expect an update for this ? It could be a very great feature.
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May 4, 2026 at 4:03 pm #195309
I’m nobody, but I don’t think we’ll see any changes to the Factor or H9 pedals.
The H90 has all kinds of other bells and whistles that apply, but I limited my comments to Space and the H9.
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May 5, 2026 at 6:27 am #195314
Yeah, you’re probable right.
But Space is still a great and useful stuff for a 15 years old pedal ! And still manufactured and sold.
It doesn’t cost anything to ask, and I think we could hope because it is a very useful and nice feature.
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May 5, 2026 at 4:44 pm #195333
FOR FREE:
1. There is a “Feature Request” thread in this forum. Eventide does review it so that would be the place to request a change.
2. You can use DualVerb.
3. Have you looked to see if midi can be used to achieve your goal?
AT MINOR EXPENSE:
1. You could sell your Space and upgrade to an H9Max. They are cheap on the used market. It will have so many other algorithms, including UltraTap which does exactly what you want. By the way, I use Factor and H9 algos in my H90 all the time and many have really held their own over the years. I know some people couldn’t part with all the knobs on the Factor pedals so that might be an issue.
2. You could put something with stereo outs before your Space (like a chorus) to create a parallel loop on your board. That would include a volume pedal and a micro mixer (RJM, Fishman, and others sell them) to link back up with your mono signal chain.
3. You mentioned wet/dry mode. I’ve never had a Factor pedal so I’m at a loss, but perhaps you could use that (without adding a stereo chorus pedal) and a micro mixer to get back to a mono signal chain.
Hope that helps.
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May 5, 2026 at 6:28 pm #195336
Thank’s for your good tips.
However, my initial concern is about a mono chain, using the Space. So no upgrade or extra stuff wanted here. (I do want and certainly will use it with stereo stuff or in another way, but that is not the point here. )
For midi control, it doesn’t seem to have this possibility, except if there are some extra messages that I am not aware of.
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May 6, 2026 at 8:55 am #195344
Have you tried out this approach?

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May 6, 2026 at 11:50 am #195346
“Have you tried out this approach?”
Now THAT’s a good question!
Bravo!
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May 10, 2026 at 6:48 am #195405
Hi,
Yes, but the swell controls entire input signal, not only wet input signal. What I want to do is to fade signal going through fx without impacting dry signal. Looks like I can’t do this in a mono chain.
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May 10, 2026 at 8:19 am #195406
I think I will try to found a cheap passive mixer pedal and use the wet/dry routing mode of the Space, with INSWELL on.
I really hope an firmware update for this, but maybe the circuit design doesn’t allow such a thing. Would be nice to have an answer of Eventide staff, just to know what is their mind.
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