Good and audible reproduction of speech and/or music is a basic condition for successful presentation and information transfer. This applies universally, regardless of whether a simple presentation set is involved, or you want to equip an exclusive meetings room, or you want to use a public address system. Sound is important. But also complex in many situations. Many rooms are designed in a way that reflects sound from the floor and ceiling or encourages feedback via the microphone. BIS|Econocom performs an extensive sound audit beforehand in order to prevent problems of this nature and we test the proposed solutions in a simulated environment. The result is optimum sound and music reproduction.