Once upon a time, there were no multi-track recorders. Every musical performance had to be played in real time and there were no overdubs. Once the 1st “Sound on Sound” recorders appeared, followed by early 4 track recorder, the music industry took off like a rocket. Elvis, the Beatles, the Stones were just a few artists who capitalized on the new technology by using them artistically. The multi track recorder (MTR) made it possible to record different tracks at different times, and allowed exacting control of the studio’s rooms to create isolated clear sounding tracks and mix them into a stunning audio image, which captivated the airwaves and the hearts and minds of nearly everyone alive.