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SMR 821 User Manual
Page 16
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Presentation Room
What exactly is a “Presentation Room” anyway? Well, it could be many things. It could be a small board room in a
corporate environment, or a large theatre-style classroom in a major university. Or, it could be a folding table in your
shop, used to present new ideas to your installation crew. Basically, any place that ideas or information can be pre-
sented to a group of people could be classified as a “Presentation Room”. In this example, we will assume that our
Presentation Room has a sound system, video display system and a means to control these systems centrally or by
remote control.
Control
System
L C R
Audio From
Video
System Features:
- Microphone Inputs for speech reinforcement on channels 1, 2 and 3 assigned to the Aux Bus only.
- Inputs for audio from video switcher. Left, Center and Right audio channels connected to channels 4, 5 and 6, assigned to Left,
Center and Aux output buses respectively. This will provide for 3-channel playback with dialog on the center (AUX) bus and
the music bed on the stereo (LEFT, RIGHT) bus.
- Stereo tape playback on Channel 7 distributed to Left, Right and Center channels.
- Stereo CD playback on Channel 8 distributed to Left, Right and Center channels.
- Interface with control system with dry contact, resistance and voltage control for Tape/CD select and overall volume control.
- Outputs for 3 channels of audio. Left/Right and Aux. The Aux bus provides the audio for the center channel.
The Control System in this example is typical of many popular software based systems. The control circuit that is connected to
the SMR-821 would be a dry contact or variable resistance type of connection. Typically, the source controls, in this case the
CD player and the tape deck, would be infrared control connections.
Stereo
Loudspeakers
Center
Loudspeaker