Esquivel is considered the king of a style of late 1950s-early 1960s quirky instrumental pop known today as lounge music. Esquivel’s musical style was highly idiosyncratic, and although elements sound like his contemporaries, many stylistic traits distinguished his music and made it instantly recognizable, including exotic percussion, wordless vocals, virtuoso piano runs, and exaggerated dynamic shifts. He used many jazz-like elements; however, other than his piano solos, there is no improvisation, and the works are tightly, meticulously arranged by Esquivel himself, who considered himself a perfectionist as a composer, performer, and recording artist.
Interesting stuff! Found quite a few texts that I will print out for bus reading!