How to Troubleshoot AmpliTube iRig

Remove your instrument cable from the iRig 1/4-inch input jack.
Insert a brand-new instrument cable into the jack. A faulty guitar cable can create sounds similar to those of a faulty interface, namely crackling and hissing. Since your guitar cable experiences much more movement than the iRig adapter, it's more likely to experience wear and tear. By replacing the cable with a new one, you eliminate a faulty cable as a cause.
Slot a razor blade into the groove along the side of the iRig casing. Once you've established entry, slide the blade along the edge and gently pry the top half of the casing away from the bottom half.
Inspect the interior. If you spot any loose or completely disconnected wires, these are the most likely cause of intermittent sound.
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