Although he had penned countless hits with David Porter for soul stars like Carla Thomas and Sam and Dave, Isaac Hayes earned his initial pre-Shaft fame by rearranging the classic pop tunes of the day into orchestral-scaled soul music. The debut of this style was "Walk on By," a 12-minute reworking of the Bacharach/David classic that opened Hayes' classic Hot Buttered Soul album. Originally popularized by Dionne Warwick, this song was originally a concise example of mid-'60s pop melodrama: the lyrics were full of intensely dramatic moments like "If you see me walking down the street/And I start to cry each time we meet/Walk on by" and the music created tension by offsetting dark melodic motifs with a light bossa nova-styled rhythm. Isaac Hayes took the song into another dimension by rearranging it in a way that dropped the song's pop-friendly veneer and played up the tormented emotions beneath its surface: his version started with an instrumental overture that wove strings, horns, and a chorale of voices into a devastating burst of operatic grandeur before giving way to an ominous soundscape that layered these searing orchestral touches over a plodding drums and Michael Toles' fuzzed-out electric guitar riffing. Hayes topped it off with a lush basso profundo vocal that built from a romantic murmur to gospel-styled wailing over the song's 12 minutes. The result was soulful yet cinematic, a harbinger of the lengthy symphonic soul epics that would soon be created by everyone from Marvin Gaye to Barry White. An edited version of "Walk on By" gave Hayes his first hit single as a solo artist, peaking in the Top 15 on the R&B charts and the Top 30 on the pop charts. It remains a favorite with soul fans and was later used to memorable effect on the soundtrack of the film Dead Presidents.