No, they either use library music of soundtracks or a popular track. Royalties have to be paid and there are royalty free tracks. A popular library is KPM.
No, they either use library music of soundtracks or a popular track. Royalties have to be paid and there are royalty free tracks.
A popular library is KPM.
^^ And echoic music use composers who write specially composed music for trailers & adverts. They get paid according to how often their music is played and any royalties they may be due.