What advancement replaced acoustic recording in 1925?

The advancement that replaced acoustic recording in 1925 was the introduction of microphones. This transition marked a significant technological leap in the recording industry. Prior to the use of microphones, acoustic recordings relied on a mechanical process where sound waves were funneled into a horn and directly etched onto a disc. With the advent of electric microphones, sound could be electronically captured, allowing for greater fidelity and a broader dynamic range in recordings.

This technology not only improved the quality of music recordings but also enabled artists to project their voices more effectively and capture a wider array of sounds. Microphones opened up new possibilities for the types of music that could be recorded, including more nuanced performances that were not possible with acoustic methods.

Vinyl discs, reel-to-reel tape, and digital recording all came later and are developments that further evolved the way music is produced and distributed, but they did not directly replace acoustic recording in the way that microphones did at the time.