The Audio Video Room that was built apart from functioning as a multi-media room can also be used as an acoustic music concert hall without loudspeakers. For example string quartet, chorus, classical guitar, acoustic band, etc. In order for the Audio Video Room to be used for acoustic music performance, the acoustic architectural design does not use porous materials that absorb sound. So that the acoustic music performance is loud enough to be heard up to the very back. The challenge of a room without a silencer is the echo and reverberation that can reduce the clarity of the sound.