Final answer:
Theater sound in the 1930s utilized 78-rpm records for recording sound effects, and the sound technician's skill in timing these effects was crucial for the performance.
Step-by-step explanation:
Theater sound in the 1930s relied on 78-rpm records to which sound effects were recorded. It depended on the sound person's ability to time the effect with the correct level. Therefore, the complete sentences would be: Theater sound in the 1930s relied on 78-rpm records to which sound effects were recorded. It depended on the sound person's ability to time the effect with the correct level.
The sound designer's role has always been to enhance the theater experience. In the 1930s, the use of sound effects on 78-rpm records was a common practice. The skillful timing by the sound person was essential for synchronizing the effects with the performance. Over time, the role of sound in theater has evolved, with advances in technology leading to a more immersive audio experience.