The Next Generation's

When the music has been composed and orchestrated, the orchestra or ensemble then perform it, often with the composer conducting. Musicians for these ensembles are often uncredited in the film or on the album and are contracted individually (and if so, the orchestra contractor is credited in the film or the soundtrack album). However, some films have recently begun crediting the contracted musicians on the albums under the name Hollywood Studio Symphony after an agreement with the American Federation of Musicians. Other performing ensembles that are often employed include the London Symphony Orchestra, the City of Prague Philharmonic Orchestra (an orchestra dedicated exclusively to recording), and the Northwest Sinfonia.The orchestra performs in front of a large screen depicting the movie, and sometimes to a series of clicks called a "click-track" that changes with meter and tempo, assisting the conductor to synchronize the music with the film.Films often have different themes for important characters, events, ideas or objects, taking the idea from Wagner's use of leitmotif.[14] These may be played in different variations depending on the situation they represent, scattered amongst incidental music. A famous example of this technique is John Williams' score for the Star Wars saga, and the numerous themes associated with characters like Darth Vader, Luke Skywalker, and Princess Leia Organa (see Star Wars music for more details).[15] The Lord of the Rings trilogy uses a similar technique, with recurring themes for many main characters and places. Others are less known by casual moviegoers, but well known among score enthusiasts, such as Jerry Goldsmith's underlying theme for the Borg in Star Trek: First Contact, or his Klingon theme from Star Trek: The Motion Picture which other composers carry over into their Klingon motifs, and he has brought back on numerous occasions as the theme for Worf,
Star Trek: The Next Generation's most prominent Klingon.