Noun
a sustained bass note
Source: WordNetWeinstein (2009), p. 24 Metal basslines vary widely in complexity, from holding down a low pedal point as a foundation to doubling complex riffs and licks along with the lead and/or rhythm guitars. Source: Internet
A pedal point is a sustained tone, typically in the bass range, during which at least one foreign (i. Source: Internet
Heavy metal songs often make extensive use of pedal point as a harmonic basis. Source: Internet