What was the Sun echo effect in rockabilly recordings?

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The Rolling Stones — rock Formed in 1962, the Rolling Stones became one of rock's most definitive bands.

The "Sun echo," also known as slap-back, was a distinctive studio effect developed by producer Sam Phillips at his Sun label in Memphis, Tennessee.12

This technique was used to enlarge and enhance the sound of early rockabilly recordings. By creating a short, rapid repetition of the vocal or instrumental signal, the slap-back effect added a sense of depth and space to the music, helping to define the raw, energetic sound of early rock and roll. It became a signature element of the Sun Records aesthetic, contributing to the iconic recordings of artists such as Elvis Presley, Carl Perkins, and Jerry Lee Lewis.21