If you asked Pink Floyd to come up with an album comprising mostly of 3-4 minute songs and covering all the musical styles of the era, this is what you would get. Consequently, it has a genuine 60s feel to it.
Richard Wright's organ work is hypnotic on Cirrus Minor and Cymbaline, and Pink Floyd rock out as never before (or since) on The Nile Song. This is much heavier than anything Led Zeppelin have done; Nick Mason bashes his drum-skins for all he's worth and Dave Gilmour all but lascerates his throat. Ibiza Bar sounds like The Nile Song Part II and consequently loses some of its impact.
There are three very etheral tracks, of which the 7 minute Quicksilver is the most demanding. Main Theme begins very similarly (crashing cymbals and swirling organ) but a quirky melody seems to rise out of this.
Then there's More Blues which has a peculiar stop/start drum pattern, and A Spanish Piece which provides a rare example of Pink Floyd messing about - the years of angst-ridden lyrics were still a little way off. There is even a hint of world music about Party Sequence and a jazzy feel to Up the Khyber. The surprise though, is the use of folk music styles on Crying Song, Green is the Colour and Cymbaline.
This is Pink Floyd at their most eclectic, and it's only the fact that it sounds a little tentative compared to the truly bizarre Ummagumma that I hold back from giving it five stars. The album's high point is the transition from the birdsong and general relaxed feel of Cirrus Minor into the crashing intro of The Nile Song.