In the 1980s, largely as a reaction against what was seen as the over-indulgence of disco, many of the core elements that formed the foundation of the P-Funk formula began to be usurped by electronic instruments, drum machines and synthesizers. Horn sections of saxophones and trumpets were replaced by synth keyboards, and the horns that remained were given simplified lines, and few horn solos were given to soloists. The classic electric keyboards of funk, like the Hammond B3 organ, the Hohner Clavinet and/or the Fender Rhodes piano began to be replaced by the new digital synthesizers such as the Prophet-5, Oberheim OB-X, and Yamaha DX7. Electronic drum machines such as the Roland TR-808, Linn LM-1, and Oberheim DMX began to replace the "funky drummers" of the past, and the slap and pop style of bass playing were often replaced by synth keyboard basslines. Lyrics of funk songs began to change from suggestive double entendres to more graphic and sexually explicit content.