Get a preview of the world premiere of “The Rake,” a hip-hopera retelling of The Rake’s Progress.

Hallucinations, Metropolis Ensemble’s recent production at (Le) Poisson Rouge, was a mind-bending juxtaposition of acoustic, orchestral instruments with electronics.

What impressed most was the diversity of approaches that the composers involved took to stretching a more or less conventional chamber ensemble’s sound through electronic legerdemain.

Metropolis was really an umbrella group that brought together instrumental soloists, chamber ensembles, singers and a few composers for a benefit performance for Partners in Health.