Gretchen Parlato has a miraculous voice. The American singer has the perfect balance of precision and flexibility. Parlato is never predictable, improvises constantly and blurs the boundaries between vocal and instrumental music. Four years after her untitled debut album, she recently released In a Dream. On this album, she takes her listeners past Stevie Wonder, Duke Ellington, Herbie Hancock and Wayne Shorter, as well as her own work. Parlato is accompanied by a virtuoso quartet comprising keyboards, bass, guitar and drums that she will take with her to Rotterdam. Herbie Hancock called her vocal artistry "a deep, magical link to music." Wayne Shorter believes she "plays the same instrument as Frank Sinatra in a subtle way." Parlato's starting point is jazz but her voice goes much further. Her timing and subtlety are remarkable, allowing her to make a difficult song sound easy.