This is very similar to instrumental improvisation, the main difference being that words can be used as well as simple vowel sounds.

The group began with recordings of extended instrumental improvisations with starkly contrasting electronic textures.

Now, because of the title, some people are led to believe that jazz is anything with a pop rhythm section and an instrumental improvisation.

Živa sila features four lengthy songs with extensive lyrics and one very long instrumental improvisation as a bonus track.

Instead the group chose an instrumental improvisation as the title track.

Nearly every moment was accompanied by instrumental improvisation.

Vocalese (with the -ese suffix) refers to a type of jazz singing in which new words are created and sung to existing instrumental improvisations.

Clear, rhythmic village songs, made for dancing and singing along, evolved into more elaborate classical forms, with sustained, floating vocal and instrumental improvisations.

"Interstellar Overdrive" was one of the first very psychedelic instrumental improvisations recorded by a rock band.

Initially known for their strident, lyric-heavy albums, their most recent recordings have been almost entirely instrumental improvisations.