Editing Rhythm guitar (section)

===Riffs===
In some cases, the chord progression is implied with a simplified sequence of two or three notes, sometimes called a "[[riff]]". That sequence is repeated throughout the composition. In [[Heavy metal music|heavy metal]] music, this is typically expanded to more complex sequences comprising a combination of chords, single notes and [[palm muting]]. The rhythm guitar parts in compositions performed by more technically oriented bands often include riffs employing complex lead guitar techniques. In some genres, especially metal, the audio signal from the rhythm guitar's output is often subsequently run through some form of effect pedal or overdriven [[guitar amplifier]] in order to create a thicker, crunchier sound for the palm-muted rhythms.