Rhythm and Poetry, otherwise known as RAP, is composed of two vital things: poetry and music. A pre-recorded sample of an instrumental piece guides the musician in his poetry-making art. It reminds us how, historically, it's oral music that is the foundation of poetry—the earliest genre of literature. Bards would play flutes and lyres in local taverns to tell the tale of the world. The parables and myths we now read from printed pages or digital screens were all once part of the bard's songs.

So, if we ask the question in terms of eggs and chickens, then music came first, and words came second. 

Recent scientific studies have proved that music influences the literary potential of a person. Those with musical backgrounds have better vocabulary and word-composing abilities. Music has the unique capacity to evoke a wide range of emotions, from elation to despair. This emotional spectrum serves as a wellspring of inspiration for writers, adding depth and resonance to their work. For instance, hearing a melancholic song may help a writer capture a character's longing, while a cheerful melody can inspire scenes of joy and celebration.

From an anatomical perspective, music and language share the same neural processing pathways in the brain. This suggests that cognitive abilities developed in one domain can be transferred to another. It means that if one has good musical ability, their language skills show equally good potential. K.C Pugh, in her study "The Effect of Music on Creative Writing," observes the same on how music influences human cognizance in ways that bring out their creative side. 

Often, writers talk about how a particular lyric from music inspired a character, theme, or plot device. Some authors have expressed the cathartic feeling music brings to them, which leads to inspiration for writing. Many authors have discovered that the correct music may create the optimal atmosphere for effective writing sessions. Instrumental music, especially in the classical or ambient genres of literature, is frequently preferred because it may create a calming atmosphere that helps with focus. It blocks out outside noise and facilitates the authors' transition into flow. In K.C. Pugh's study itself, we find a similar argument. He said, "Music is mostly an amplifier for emotions; it brings out things we already feel." [1]

A quick YouTube search will show results like "Writing ASMRs" or titles like "Songs to listen to while writing." The name of the video changes, but the theme remains the same: music to inspire or encourage writing. Many books published in recent years now come with an extra page titled "Playlists," which has a curated list of music that matches the theme and plot of the book while having inspired the writer in some way. Thus, if we look at it historically, scientifically, or in a social light, music has influenced and "amplified" literary potential. Whether it be RAP, story books, or poems, the lyrical ambivalence of words stays eternal. 

Citation:

Pugh, K. C. (2014) "The Effect of Music on Creative Writing," The Idea of an Essay: Vol. 1, Article 21.