Soon All Will Know is an original blues composition by Wynton Marsalis, first recorded on his 1987 album Marsalis Standard Time, Vol. 1 for Columbia Records. The tune is a hard-swinging blues vehicle designed to showcase the interplay and rhythmic freedom of Marsalis's working quintet, which at the time included Marcus Roberts on piano, Robert Hurst on bass, and Jeff Tain Watts on drums. Stanley Crouch's liner notes for the album highlight how the piece demonstrates the group's approach to metric counterpoint, with each musician interpreting the form polyrhythmically rather than adhering to strict timekeeping. The composition captures what Crouch described as a raucous, arrogant plasticity of swing, evoking the spirit of earlier jazz traditions while reflecting Marsalis's commitment to advancing the music's fundamentals through sophisticated ensemble arrangements. Concise at roughly three and a half minutes, the tune serves as a compact but potent platform for improvisation. It remains closely associated with Marsalis rather than having entered wide circulation as a jazz standard, and it was later included on the 1991 compilation Popular Songs: The Best of Wynton Marsalis. Marsalis's trumpet solo on the original recording is featured on AllSolos.
