An American female R&B group.
Musical improvisation (also known as Musical Extemporization) is the creative activity of immediate ("in the moment") musical composition, which combines performance with communication of emotions and instrumental technique as well as spontaneous response to other musicians.  Thus, musical ideas in improvisation are spontaneous, but may be based on chord changes in classical music.
Because improvisation is a performative act and depends on instrumental technique, improvisation is a skill. There are musicians who have never improvised and other musicians who have devoted their entire lives to improvisation.[