Wahwah

a small rounded handle

to tinker: to experiment, make small changes

to take a break or pause for lunch

got a job

to try music as a career

changing, adapting

made someone interested

a large department store

to move back and forth; a style of music (short for rock and roll)

In the mid ’60s, Casher helped develop a device he envisioned as the new voice of the guitar.