Complex sentence: His music fused American big band swing-jazz with Afro-Hispanic music--mambo and boloro, in paticular--and his music was led a trend with other notable Los Angeles big bands that was a precursor to salsa.
Split into simpler sentences: His music fused American big band swing-jazz with Afro-Hispanic music--mambo and boloro, in paticular. His style became a popular trend with other notable Latin oriented Los Angeles big bands that became a precursor to salsa.