A music composer's main responsibility is to create the musical foundation of a song, including the melody, harmony, and overall structure.

A songwriter's primary role is to create the lyrics for a song, which convey the story, message, or emotions of the song.

Songwriting is the process of combining music and lyrics to create a complete song, which typically includes a verse, chorus, and bridge.

Songwriters primarily earn income through songwriting royalties, which are payments made to the songwriter each time their song is played on the radio, streamed online, or used in a film or television show.

Copyright is the legal protection given to musical works, including songs, which grants the songwriter exclusive rights to reproduce, distribute, and perform their work.

In the United States, the copyright for a musical work typically lasts for the life of the songwriter plus an additional 70 years.

A music publisher's role is to promote and distribute music, including songs, to various outlets such as record labels, radio stations, and online streaming platforms.

A royalty split is the process of dividing the royalties earned from a song among the songwriter, publisher, and other parties involved, such as the record label and producer.

A synchronization license is a legal agreement that allows a songwriter to grant permission for their song to be used in a film, television show, or other media, in exchange for a fee.

A mechanical license is a legal agreement that allows a songwriter to grant permission for their song to be reproduced and distributed on physical formats such as CDs and vinyl, in exchange for a fee.

Digitization is the process of converting a musical work into a format that can be played on a computer or other electronic device, by representing the music as a series of digital bits.

Streaming is the process of transmitting music over the internet in a continuous stream, allowing users to listen to music without downloading the entire file.

Compression is the process of reducing the size of a digital music file without significantly affecting the sound quality, by removing redundant or unnecessary information.

A synchronization license is a legal agreement that allows a songwriter to grant permission for their song to be used in a video game, in exchange for a fee.

A public performance license is a legal agreement that allows a songwriter to grant permission for their song to be used in a live performance, in exchange for a fee.