Believing that focusing only on "clean tones" is negative, Frusciante developed an interest in playing with what he calls a "grimy" sound.

The sound is characterized by a shivering vibrato, clean cutting tones and a series of ten second sustained notes.

It is also often used for its clean tone.

This gave him his very distinctive clean tone, an example of which can be heard in his playing on Cat's Meow.

Metal rang out again, pure clean tone of a bell, and the god once more looked surprised.

He used a death grunt on the band's first three albums, but on Icon refined his voice to have a cleaner tone.

The new versions have a continuous 45 degree edge, making what some feel is a fuller, cleaner tone.

And he showed me how to keep my fingers flat on the keys to get that clean tone.

The amps are known for their characteristically clean tone.

In transferring bebop to the trombone, he used a clean, dry tone and short notes.