Though hardly a conventional orchestra, this ensemble represents a big step toward Mr. Glass's subsequent embrace of the orchestral tradition.

In addition, the ensemble has represented the College at a number of high profile regional events.

An ensemble of 10 one-fourth-life-size nude men on a shelf represents a Boschian satanic ritual.

This ensemble also represents the University Choir on tour and at special events.

But that ensemble represented just one area of exploration for Mr. Hemphill, above, who left the group in the early '90s and died in 1995.

Each ensemble represented a continent from the five Olympic rings.

These ensembles represent the chorus at outreach events, hold their own concerts, make recordings, and are featured regularly in concerts with the full chorus.

Throughout the season, ensembles representing the festival's best undertake tours, and since 1970 these groups have had an annual series at the Metropolitan Museum.

Another ensemble of Juilliard graduate students, the Magellan String Quartet, represents a midway approach.

The trained ensemble, therefore, represents a single hypothesis.