Walker's compositions and arrangements are widely sung today by Sacred Harp singers as well as others. His work is represented by 13 songs in the current 1991 "Denson" edition of "The Sacred Harp", and by 12 in the "Cooper" edition. According to the collated minutes kept by the Sacred Harp Musical Heritage Association, his song "Hallelujah" is sung more frequently at Sacred Harp conventions than is any other. The Walker songs are generally sung in four-part versions, with alto parts that were added by early 20th-century composers.