With TASCAMÂ's GTR1, you can plug in and record anywhere. It combines a portable recorder with an instrument trainer for the ultimate songwriterÂ's toolkit. Record using the built-in stereo condenser microphones, or plug in your guitar or bass to record using the amp simulator, reverb and multi-effects. The GTR1Â's built-in rhythm machine sets the groove when beginning your song, and the overdub mode allows you to build a song step-by-step.