Duality is at once sacred and playful. It is both dark and light, organic and refined, masculine and feminine. Dead Can Dance's Lisa Gerrard partners with Pieter Bourke, formerly of Aussie band Eden, to create this compositional dance of partnership that is classical, ancient, and thoroughly modern. Gerrard's voice is multitracked at times, conjuring a cathedral choir and the droning chants of monks. Drums and synth snake from desert to brilliant stormy sky to shaking earth and the bodies that inhabit those spaces. There are lush multiple layers of strings, bagpipe drone, and, quite literally, the laughter of children. The vocals sans "real" words and multicultural instrumentation will be familiar to Dead Can Dance listeners. Yet there is something more exclusive, more womblike about the music of Bourke and Gerrard; rather than two distinct bodies making music, like mother and in utero child sharing blood and breath, they are mutually dependent.

Sakamoto's all-star blend of Western and Eastern music styles is a triumphant success for the composer, and a consistently good listen. On the title track he takes a traditional Japanese folk song and blends it into a funk groove provided by Bootsy Collins, Bill Laswell, and Sly Dunbar. Unlike Byrne and Eno's My Life in the Bush of Ghosts, this blend of cultures is coming from the opposing angle and stays truer to the source material. But that track is only one of Sakamoto's approaches, and on several other tracks he joins with Laswell to create a crisp, techno-cultural hybrid that sounds like nothing except like pure Sakamoto. On "Risky," a subdued Iggy Pop lends vocals and lyrics, and doesn't come across as an interloper. And on "Okinawa Song," Sakamoto seamlessly integrates the southern island culture into his grand scheme.

As disco became an important part of the international music business, European producers began working in exotic flavors into the disco beat to create unique and competitive recordings. A good example of this trend is Santa Esmeralda, a Spanish-themed studio group that wove elements of flamenco, salsa, and other Latin musical styles into its Euro-disco sound. Although the group's sound was about as genuinely Spanish as Herb Alpert & the Tijuana Brass (Santa Esmeralda was the brainchild of French record producers), the result was a crossover success that spawned several club-favorite albums and a notable pop hit in the band's Latinized cover of "Don't Let Me Be Misunderstood".

Over a period of five years, Swiss directors Norbert Wiedmer and Peter Guyer documented the activity of legendary producer Manfred Eicher, the founder and driving force behind ECM Records, whose advocacy of progressive jazz and of classical composers like Arvo Pärt, Meredith Monk, Valentin Silvestrov, and György Kurtág changed the landscape of contemporary music in the late 20th and early 21st centuries. The film Sounds and Silence: Travels with Manfred Eicher was released in 2009 and this 2011 soundtrack album is made up largely of tracks taken from previously released ECM albums that Eicher produced, some from as early as 1980. Most of the pieces are low-key and understated and feature chamber ensembles, although there are several piano tracks and several featuring orchestra or chorus. The album has a mix of selections from ECM's classical and jazz repertoire, and from the label's specialty, the many pieces that lie somewhere in between the two.

With this amazing album, Dead Can Dance fully took the plunge into the heady mix of musical traditions that would come to define its sound and style for the remainder of its career. The straightforward goth affectations are exchanged for a sonic palette and range of imagination. Calling it "haunting" and "atmospheric" barely scratches even the initial surface of the album's power. The common identification of the duo with a consciously medieval European sound starts here – quite understandable, when one considers the mystic titles of songs, references to Latin, choirs, and other touches that make the album sound like it was recorded in an immense cathedral.

Their reputation growing by leaps and bounds, including a huge underground following in the U.S. – they were able to tour there even without one domestic release available, while at one point Dead Can Dance was the biggest selling band in 4AD's history – Perry and Gerrard once again did the business with Aion. Its cover taken from Bosch, Aion's medievalism was worn more openly than ever before, with songs adapted from centuries-old material. The beautiful, entrancing "Saltarello," with lead performance by what sounds like an old wind instrument, comes from an Italian dance of the 14th century, while the mysterious moods of "The Song of the Sibyl" derive from 16th-century Catalonia. The group's command of not merely recording possibilities – witness the exquisite layering of vocals on the opening "The Arrival and the Reunion" – but of musical traditions, instruments, and more from around the world was arguably never stronger. Gerrard's vocals in particular have an even stronger, richer feeling than before, not merely able to command with its power but softly calm and seduce.