Sorry for bumping an old topic, but I got my G2m today and the same thing is happening.
Out-of-the-box I was able to play 20 minutes then, as I switched the cable on the Jack IN side (to try a different Mic*), no signal was sent to my MIDI sound module.
I tried everything, changed the MIDI cable, the battery, used another MIDI expander but to no avail .
As I was looking for some info on the forum I bumped into this thread, so I nudged the midi cable on the G2M side and the signal flowed again.
So I reckon there is something wrong with some units.
Can you indicate whether this is a known issue and if you can organize an exchange/repair?
My serial # is 1102398 and I ordered it from a reseller affiliated with AUSMIDI in Australia.
It's such a great device for AU$159,00 and I would love to be able to use it, as my tests have shown it could be quite good in my current setup, but I only play in live situations and cannot take the risk of an intermittent failure, and I am not confident enough to re-solder the unit myself (nor do I have the equipment).
Many thanks in advance,
Toff.* Yes I use it to convert my voice to MIDI - Since I own a Roland GR-55 Guitar Synth which I use with my hex-pickup-equipped Godin, I am not after guitar-to-midi. I use the G2M to drive another sound module with a high-impedance mic from Senheiser passing through a Digitech Vocalist Live5 to get compressor / noise gate & high-pass filter (to kill my drummers' and other instruments' sounds) + pitch correction (to 'force' the generated voice to be on pitch and behave chromatically) - WIth the chromatic mode set to ON on the G2M it is almost flawless