 A landmark device was the EchoSonic made by American Ray Butts. It is a portable guitar amplifier with a built-in tape echo , which became used widely in country music (Chet Atkins) and especially in rock and roll (Scotty Moore).
<coherence>  A landmark device was the EchoSonic made by American Ray Butts. It is a portable guitar amplifier with a built-in tape echo , which became used widely in country music (Chet Atkins) and especially in rock and roll (Scotty Moore).
 According to Sound on Sound, "The character and depth of sound that was produced from tape echo on these old records is extremely lush, warm and wide."