The speaker supports a theme in the poem "The Weary Blues" by revealing the mood and sound of the blues.
In literature, theme is the underlying message or idea in a literary work. In other words, it is the message that an author wishes to convey. In "The Weary Blues," the theme revolves around the importance of music to convey feelings.
The theme above is supported by how the speaker reveals the mood and sound of the blues. The descriptive language used in the poem, with words such as "mellow", "pale", "dull", and "lazy sway", helps convey the way the music is played as well as the ambiance.
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