What does crossfade refer to in sound design?

Crossfade refers to a smooth transition between two sound files or sources, allowing one audio track to fade out while another fades in. This technique is commonly used in sound design to create a seamless listening experience, such as in music mixing or during sound transitions in film and theater. By overlapping the audio tracks, crossfading can help maintain the flow of sound, avoid abrupt changes, and enhance the overall auditory experience.

The other options do not accurately describe crossfading. The first choice discusses a visual transition, which is unrelated to sound. The second choice describes a sudden audio interruption, which contrasts with the gradual nature of crossfading. The fourth option involves amplifying sound, which is a different aspect of sound manipulation.