Archive of the former Yahoo!Groups mailing list: The Mellotron Group

I just received a Korg XVP-10 volume pedal for my Trons. So far, it's the best pedal I've found...very smooth and ergonomically perfect. There are two inputs for use as a stereo expression pedal. I first plugged in my M4000 and it works great. Then I added my M400 and that works great, but the M4000 no longer produces sound. I switched the cables, but still the same...M400 has sound, M4000 has none. There's something quirky about my M400 though. It doesn't produce sound when there is no expression pedal plugged in. Could the wiring of the jack be the cause of the problem?