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Just got mine today. I don't remember exactly when I signed up for the list, but I'd guess it's been 6 or 8 weeks. Came with a little bit different finish from the ones I've seen.
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What type of expression pedal are you using?
The FM knob turns into an "attenuator" for the expression pedal when you have one connected, so if you have the FM knob turned all the way down or mostly down, the expression pedal will appear not to do anything. Also if the expression pedal has its own attenuator like the Moog ones, check that that's not turned down.
I have the same setup and it works fine - i have the 3 outputs of the Reflex going to a FMeron, a Xerograph, and a QF2. one of hte 3 outputs is a different ohmage so its not as effective, but all work...I tried a source audio reflex controller expression. I tried 2 of the expression outputs with 2 different TRS cables. I also tried an ernie ball volume pedal with a TRS on the pedal end and the ring/tip in the appropriate spots on the volume in/out to be an expression. Both of these setups work on every other pedal. Is there anything special about the FMeron? Does it not need a TRS cable? I also have a dunlop volume/expression that I can try. Seems to me like something is just not working. I can try more later, but curious if there is any guidance to ensure it is not a problem with the pedal? @Taylor Livingston
I tried a source audio reflex controller expression. I tried 2 of the expression outputs with 2 different TRS cables. I also tried an ernie ball volume pedal with a TRS on the pedal end and the ring/tip in the appropriate spots on the volume in/out to be an expression. Both of these setups work on every other pedal. Is there anything special about the FMeron? Does it not need a TRS cable? I also have a dunlop volume/expression that I can try. Seems to me like something is just not working. I can try more later, but curious if there is any guidance to ensure it is not a problem with the pedal? @Taylor Livingston
It does need a TRS cable, and there's nothing too special about it beyond the thing about the FM knob attenuating the expression control when the exp pedal is connected. Please email me at info at ironether.com and I'll be happy to help you sort it out.
@cosmicevan and I continued this by email, but it's a good opportunity for me to explain something better than I did in the manual: The envelope and expression pedal have equal power to sweep through the full FM range, and they're both active simultaneously. If you have the Env Depth up most of the way, it will be sweeping through most of the available range on its own, so the expression pedal has little room to affect the sweep. So as @JMGiraffe says above, the solution is just to turn down the envelope depth - I suggested starting it all the way down while playing with the expression pedal at first to get the hang of this "democratic" control, and then adding in a bit of the envelope to taste.
FWIW, the FMeron doesn't do any filtering, but it does generate lots of harmonically rich sounds to send into a filter like the Xerograph Deluxe.
The DX7 has hundreds of parameters that can be programmed, and it would be impractical (and big and incredibly expensive) to have hundreds of knobs