In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. If you can operate a CD player, you can use the CD-GT1mkII. Take any standard compact disc by your favorite band and put it in the CD mechanism. Then plug your guitar directly into the CD-GT1mkII's 1/4" input. Put on some headphones, set the volume, and start rocking! If you're a vocalist, you can do the same, substituting your microphone for the guitar.