'I couldn't tell who was colored and who was white', admitted the African American trumpet player Roy Eldridge after being submitted to a so-called blindfold test by the white critic Leonard Feather in 1951. Feather was happy that the blindfold test duped a prominent Black musician, because it proved his point about the fundamental colourblindness of music and listening. Through close reading of the source material, this article provides the full context for this infamous case and shows how the blindfold test was a product of transnational discourses of colourblindness, primitivism, 'reverse racism', and technological mediation. Building on current research in racialized practices of listening in musicology and sound studies, and mobilizing interventions from critical race studies, the article contends that acousmatic techniques of listening often promote a colourblind ideology invested in whiteness, which remains hegemonic in music culture.