If you can operate a CD player, you can use the CD-BT1mkII. Take any standard compact disc by your favorite band and put it in the CD mechanism. Then plug your guitar directly into the CD-BT1mkII'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. Effect Yourself The CD-BT1mkII has 16 great-sounding built-in customizable bass effects...you don't need to turn to external boxes for chorus, EQ and more. The Bass Boost and Enhance settings allow you to boost the bass part so that you can hear it better, and Bass Cut lets you mute the original so you can play along. Performance Tools You can set seamless in-out loop points with the CD-BT1mkII...it will play the same section of music over and over again so you can focus on your playing. Use the footswitch input to start and stop the CD, or to scroll through effects. The CD-BT1mkII even provides a chromatic tuner so you always sound great when you play, and can run on batteries to take your show on the road. You can listen to the CD-BT1mkII via headphones, or use its Line Output to plug in speakers. Specifications: Easy-to-use interface VSA (Variable Speed Audition: pitch control without affecting key): +16, +12, +8, +4, 0, -4, -8, -16, -32, -50% Key Control: ±6 semi-tone, in semi-tone steps with ±50 cents fine tune VSA and Key Control can be used at the same time +16 to -50% Pitch Control ...