You imply all popular music flied with the Jefferson Airplane, whips with the Cream, slams with the Doors, swims with the Fish, or is Dylan-pickled. A glance at the hit charts of the last few years or an examination of the songs played by "in" stations proves otherwise. Immensely popular songs have been recently released by nonpsychedelic artists like Herb Alpert, the Cowsills, the Seekers, the Supremes, and Elvis Presley . . .