What material was used for the first disc recording of sound?

Later, the text states: "However, it was not until 1887 that this discovery was used to record sound on a disc, thereby creating a medium that could be mass-produced." This refers to the first disc recording. The paragraph then describes Emile Berliner's method for recording on a "flat disc" and how it could be reproduced.

While wax is mentioned as a material for Edison's cylinder recordings, the paragraph does not specify the material used for the first disc recording. It only refers to it as "a disc" or "a flat disc." Therefore, the statement that the first disc recording captured sound on a disc made of wax is not explicitly provided in the text.

The correct answer is not given.
not given