Are the type of glasses you wear when you watch a 3d movie; a red filter covers one eye; a blue filter covers the other. when viewing a 3d film with these glasses, your brain creates a 3d effect.

Nstrumental music that supports the main part(s) chamber music 2. a large group of instruments usually including woodwinds, brass, and percussion band 3. music written for small ensembles for an intimate setting accompaniment 4. a person who leads an ensemble conductor 5. an electronic keyboard capable of multiple instrument sounds