Musical improvisation is the generation of spontaneous music, often in (or according to) a pre-existing harmonic framework, chord progression, or riffs. Improvisers use the notes from the chord, several scales which might be linked to each chord, and chromatic ornaments and passing tones which can be neither chord tones https://song77776.blogproducer.com/38100218/song-things-to-know-before-you-buy