* Call and response: This is a technique where one improviser plays a musical phrase, and the other improvisers respond with their own phrases. This can be used to create a sense of dialogue between the improvisers, and to develop new musical ideas.
* Trading fours: This is a technique where each improviser takes turns playing a four-bar solo. This is a common technique in jazz improvisation, and it allows each improviser to showcase their individual skills.
* Comping: This is a technique where one or more improvisers accompany the soloist by playing chords or other supportive material. This can help to create a rhythmic and harmonic foundation for the soloist, and to bring out the best of their playing.
* Repetition: This is a technique where an improviser repeats a musical phrase or idea multiple times. This can be used to create a sense of momentum or urgency, and to develop new musical ideas.
* Variation: This is a technique where an improviser takes a musical idea and changes it in some way. This could involve changing the rhythm, melody, or harmony of the idea. This is a great way to create new interest in an improvised performance, and to keep the music from sounding repetitive.
Building within improvisation is a skill that takes practice and experience to develop. However, with time and effort, any musician can learn to improvise effectively.