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Instruments use a ¼” (6.35 mm) TS (2-pole) jack plug. Do not use TRS (3-pole) jacks with the iTrack
One Pre.
1/4” TRS (3-pole) jack plug
1/4” TS (2-pole) jack plug
3-pin XLR plug (male)
Note that inserting an XLR plug into the INPUT socket will configure the iTrack One Pre as a mic
pre-amp, with the higher gain that microphones require: if you connect a higher level signal using an
XLR plug, you could easily end up with distortion!
The GAIN control has an integral “halo” LED to indicate signal level. Turn the GAIN control clockwise
while using the mic or instrument until it turns green. The halo should remain green most of the
time while you are playing or singing, but it’s OK if it goes off in the ‘gaps’. If it turns red you have the
gain set too high, and it should be turned down a bit. The best way to test that your gain level is not
too high is to play at the loudest you think you’ll be while recording, and ensure that the gain halo
does not turn red.
Your recording app will let you monitor what you’re recording via a pair of headphones connected
to your iOS device’s headphone output. When you plug the headphones in, the iPad or iPhone will
usually reconfigure its audio setup as it disables the internal speaker. The green ON LED on the
iTrack One Pre may go out momentarily – this is normal. You will probably see a message like this:
Screenshot taken from Garageband.
