The producer can employ the music for that which they want, while never not having not to pay any surtax. To reduce production costs, these libraries are typically created using the synthetizers and of the machines of drum with a watering of the musicians of phase here and there.
Another type of buy the licence outside can be a covering licence of use until some limit. For example, you could be able to employ the music for all the kinds of productions like and of all the local productions on the radio and the TV but are restricts national use without additional royalties. Still another type of licence is an unlimited use of the music for an any specific use.