ANSWER:
Tape studio
Step-by-step explanation:
The main tool of composers of electronic music during the 1950's is tape studio. It was first made in Germany in 1953. Later on, it was also found in Japan and the United States in the late 1950s. It was used by speeding it up and down, altering pitch, giving echoes, filtering and by changing the tone. It was difficult and time consuming to use.