His yodeling obsession was accompanied by a love of obscure stringed instruments like the zither and hammered dulcimer, both of which he taught himself as a child. In his teens, Ischi taught himself to yodel by listening to Franzl Lang records and imitating what he heard. In case you aren’t familiar, Lang is one of yodeling’s most revered figures and is widely known as the “Yodel King.”
One of the first standalone units was the EchoSonic, an amplifier with a built-in tape loop for echo effects. It was built by Ray Butts, and it allowed guitar players to use slapback echo, which dominated 1950s rock ‘n’ roll guitar playing, on stage.