In System both inputs were set to -4.00 dB. I’ve changed that to 0.00dB. The effect still exists, but maybe a little less? The inputs are from single coil passive string pickups; what would you suggest as suitable levels?
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I notice that https://wiki.moddevices.com/wiki/Device_Settings#MOD_DUO_X describes the default Profile settings in terms of % rather than dB. That discrepancy in terminology does not seem helpful (or am I looking in the wrong place and comparing different things?).
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Studying further I noticed that the effect seems to be more significant at some frequencies; most noticeable at very high (high guitar string) or very low (low bass string). Some crosstalk on the instrument pickups is not unimaginable. The low bass string is substantial and is the one that is closest to the melody (guitar) pickups. It seems less likely that the very insubstantial high guitar string, the one that’s furthest from the bass pickups, would register significantly on bass pickups and yet it’s the string that gives the greatest effect. Muting the opposite set of string slightly reduces the effect, but only slightly, so I don’t think that sympathetic vibration is significant.
However, having gone through those thoughts I tried plugging direct into my mixer. Result, I see an effect there too! That’s strange as I’m sure I tried that a few days ago & didn’t see any bleed! However, given what I’ve just seen I have to assume that based on current evidence the MOD Duo-X may be the innocent victim of an external effect?
I’ll ask around in the Stick community to see if anyone can cast further light on this. If that ends up revealing something that looks to be MOD Duo-X specific I’ll report again.
Thanks for your time.
PS. Your view(s) on my question about suitable input dB values in System would still be appreciated.