Film scores encompass an enormous variety of styles of music, depending on the nature of the films they accompany. While the majority of scores are orchestral works rooted in Western classical music, many scores are also influenced by jazz, rock, pop, blues, new-age and ambient music, and a wide range of ethnic and world music styles. Since the 1950s, a growing number of scores have also included electronic elements as part of the score, and many scores written today feature a hybrid of orchestral and electronic instruments. Since the invention of digital technology and audio sampling, many modern films have been able to rely on digital samples to imitate the sound of acoustic instruments, and many scores are created and performed wholly by the composers themselves, by using music composition software, synthesizers, samplers, and MIDI controllers.