AH +FX Mono to Stereo

This is driving me nuts! I wanna plug in a Mono-Source into the L input and still have a Stereo output. I got it working a few months ago but I don’t remember how I did it. Pure luck I guess.

Yesterday I tried unplugging the R Input, then turning the AH off and on again, didn’t work. Tried unplugging R while the unit was on, tried turning it on without anything on the inputs and then inserting L, removed both inputs while the unit was on, turned it off and inserted L, tried all thinkable other combinations and nothing ever works… Is there a hidden menu-function or a shortcut or something?

I noticed that when I just plug in the L cable half-way, it works, but the cable is very loose in that case. That’s not practical…

Please help!!

Have you tried changing the cable you are using ?

or maybe this?

i don’t want to use split-cables.
especially since i already had it working once.
and if you needed to use split-cables for this, then why does @Elektron print L / Mono on the thing?

I’ve had three different heats and never got it to work mono-stereo. I never knew it could work without stereo in’s

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That sounds like you’re connecting a stereo TRS signal to the Heat+FX’s mono input.

For mono, you need to only connect a cable to the L input.
It should be a TS instrument cable, or a mono TRS balanced signal.

If your source has a stereo output, you need to split it from TRS to 2x TS.
Knowing what you’re trying to hook up to it would probably help.

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nope. i use a TS cable. the source is mono, i tried modular, ms20 mini, one track from analog four, even a guitar…
can someone else just try this on their AH +FX?

Fair enough. Considering the amount of time this has been an issue for you it seems like the easiest £5.65 solution going.

But yes the L/M on the back of unit is bit infuriating if it’s not implemented.

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yes and again, it once worked.

i just had the idea maybe it has to do with the flow-page… like it only works if the “heat”-block is first in the chain or something like that. will check it later today. it just seems like some kind of bug to me.

Have you contacted Elektron?

If you’re definitely using a TS cable (not TRS) connected to a mono output, and it only works when plugged in halfway, it sounds like that is either a bad cable or a hardware fault.

The latter would be very unusual.

it is not the cable!! i have tried several. does noone on this forum have a AH+FX and can check if it works for them?

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One of the FX modules is called Stereo Focus, and it will move left and right channels to the center below a set frequency. I don’t know for sure how high this crossover frequency can be set, but is it possible that when you say you got it working before, you were using that effect in the FX block?

Otherwise, I can’t see how a mono input to stereo output is possible on the unit.

I’ll check this shortly with my perkons which has a mono output.

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good call, will check it with the stereo focus later, although i almost never use that one.

mono to stereo should be possible, input L/M is printed on the box and also in the manual it says
INPUT L (mono)/R, Audio inputs. Use either 1/4” mono phone plug (unbalanced
connection) or 1/4” (Tip/Ring/Sleeve) phone plug (balanced connection).

so I’ve just tried Perkons Mono output into L/M input of AH+FX with a TS 1/4" cable and all working here. Tried with headphones on the AH, and then also in overbridge mode running into my MBP/ableton and it’s summing the mono to stereo, ie getting the same signal in both channels fine.
I swapped the input to the right AH input channel to check, and if I do that I only get signal in the right hand side. also if I deactivate/bypass the unit, the summing still works correctly so I don’t think it’s to do with FX on/off or the flow of them.

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thanks a lot for checking!! that’s strange… can you elaborate when / how you connected / disconnected stuff? like was the unit off when you removed the cable from the R input?
also do you have analog mode on in the settings? if not, what effects are on and what does your chain look like?
thanks again!

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thanks. this means everything is on, except for the delay, right? i have never used the AH with overbridge. what does the “Channel(s)” setting do? is it just to show the waveform?

like I mentioned, it works completely bypassed, but here’s the overbridge settings. analog mode is off. it’s in L/R not midside mode. I powered both units on and then connected the audio cable between them. interestingly, when I pulled out the jack from the AH to try the right channel, the unit went mute and I had to cycle the power on again to get it to recognise any input signal, so that time the AH powered back up with all audio jacks connected.

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