The term "guitar solo" often refers to electric guitar solos played in blues and in rock. The electric guitar is played through a guitar amplifier to make the instrument loud enough. Guitar amplifiers also have preamplifier and tone controls, and in some cases, overdrive controls that modify the tone. The use of a guitar solo as an instrumental interlude was developed by blues musicians such as John Lee Hooker, Muddy Waters, and T-Bone Walker, and jazz like Charlie Christian. Ernest Tubb's 1940 honky tonk classic, "Walking the Floor over You" was the first "hit" recording to feature and highlight a solo by a standard electric guitar–though earlier hits featured electric lap steel guitars. Blues master Lonnie Johnson had also recorded at least one electric guitar solo, but his innovation was neither much noted nor influential.