Tascam USB 122 + onboard factory-installed Martin acoustic pickup = lost signal. Wha?
I have a Tascam USB 122
breakout box that I use with Garageband to noodle around. Usually I record everything acoustically, close-miking the guitar and such with the lines going to the mic line-ins, and that's just fine.
Today, I was too lazy to set up the mics and just ran a quarter-inch patch from the butt of the guitar's factory-installed onboard jack to the quarter-inch-in on the Tascam. No matter what position the input switch was set to (line/guitar or mic) I couldn't get a consistent signal.
Running the patch through a pedal tuner, I did get consistent signal there. I did not dig out an amp as laziness was ruling the activity.
When I would -first- plug the patch in, a strum would produce clear, sweet ringing tones that were clearly showing signal and audible in the headphones. Then for no discernable reason, the signal would stop.
I swapped cables and all cables showed consistent signal on the tuner, with no discernable cutouts when subjected to the rigorous wiggle-and-fiddle test.
I did NOT disassemble or remove the pickup, and don't have papers that tell me what was installed. There is an easily accessible 9v battery visible through the sound hole, which I have not changed (but will as soon as I hit post).
Using two separate straight electrics into the quarter-inch jack produced satisfactory results.
I *think* the anomaly is a result of running what is essentially a mic off a quarter-inch plug with no intervening EQ or preamp. Still, I'm baffled by the initially successful signal. What gives?