Iron Butterfly's In-A-Gadda-Da-Vida (1968), with its 17-minute-long title track, using organs and with a lengthy drum solo, also prefigured later elements of the sound.
Album In-A-Gadda-Da-Vida (1968) od Iron Butterfly s rovnomennou 17-minútovou titulnou skladbou, využívajúc organy a dlhé bubenícke sóla, takisto predznamenal neskoršie prvky tohto soundu.