Ghost writing has been going on for years as even the best of authors and orators can get stuck and find themselves facing writers block, unable to write a single word and just needing that little nudge or inspiration to finish their works.
The same goes for music, sometimes artists and musicians, be it bands or solo artists find themselves stuck at certain points in songs and find themselves unable to complete the song or album, they then hire ghost producer to come in and finish the song for them.
This can be done either by the writer doing the lyrics for the song which he then hands over to the musicians and they then work on the sounds and runes for the words, turning them into a complete song.
Often the writer and artists are in contact with each other so that the music ghost writer can get an idea of the type of song the musicians are looking for. If they've already worked out the music and only need the lyrics, this helps the ghost writer get down the lyrics as he only has to fit them to the tune and according to the idea that the artist might have with regards to the song.
Another way of going about this could be to ask the music ghost producer to do a complete song for the artist. This means that not only does the writer work on the lyrics for the song, but he also handles the musical arrangements and gets down all the instrumental parts.
These can include guitar tracks, piano, or drums, depending on what the artist needs and the writer is capable of providing. In a way, in such a scenario the music ghost producer provides the musician with an almost complete song, and all that's left to do is put down the final tracking.
In such cases, the writer and artists aren't in contact much which leaves all decisions up to the writer as to how they want the song to go, with the artist having the final say. With the demand for music ghost producers increasing yearly, there are now internet companies as Edmwarriors specializing in the art of music ghost producers coming up that offer specialized services according to the type of song needed.