1. The production of film soundtrack can never be completed by one person. First of all, the composer should write the music suitable for each scene according to the needs and styles of the plot and the requirements of the director, and then the symphony orchestra, electronic synthesizer, a band or singer will perform it. There are also some special cases where existing works are quoted (such as "what i have done" by Linkin Park is the theme song of "A Change of Heart"), or the original version of a famous classic song is applied or reinterpreted by the composer personally. After that, post-production and recording of music should be carried out, and editing should be carried out according to the film picture and plot. In this process, people who compose music often wear several hats. These songs are assembled into a CD and released as the so-called soundtrack album.

2. The number of tracks for the soundtrack should depend on the duration and plot changes of the film, the composer's understanding of the film and his own ideas.

3. After the pre-shooting, the film will be post-produced. For example, special effects production, picture editing, actor dubbing (except those recorded live during shooting and without re-dubbing) and music dubbing, etc., so the music should be edited accordingly or even revised.

4. This question depends on the personal accomplishment of the "master of music" and other circumstances. As mentioned above, "wearing several jobs" is common.

Let's not talk about the master of the soundtrack (Baidu knows about it). We recommend several awesome studios, X-Ray Dog (everyone knows that when it comes to trailers and soundtracks, they are definitely masters), Two steps from hell (doing the soundtrack for Farewell Atlantis trailers) and Immediate Music (also very classic, and several auditions and downloads of their works can be found on Baidu). These are studios specializing in the soundtrack of movie trailers, and they also have their own official websites. However, because their music is not released and involves copyright issues, it is difficult to find, but as long as you look for it (English web pages should also go), there must be. If you are interested, I can send you two songs to try, and there is nothing I can do about them. There are BT seeds.

digression, look at your reward, it's really a "1 points" obsession, dizzy ~