Throughout the 1950s and 1960s, the role of music producers changed drastically with the introduction of MTR. What does "MTR" stand for?
Answer Multitrack Recording
The development of multitrack recording created major waves in the world of music production. Prior to the introduction of multitrack recording, every element of a song had to be performed simultaneously.
Asked by Rachel Bortles · Last updated 5 years ago · 1.6K views · SOURCE