Home

Engineering

Publications

	WPI Technical Theatre Handbook: Signal Processing Equipment
	Signal Processing Equipment There is a class of equipment which typically is used in between the sound sources (microphones, CD players, etc.) and the output section (amplifiers and speakers). This equipment is known as signal processing gear. Included in this category are equalizers, compressers, limiters, noise gates and effects processors. Signal processing gear is typically used with the auxiliary sends mentioned above in the sound board section, or is inserted on each channel. Most sound boards allow for a special cable called an insert cable to be plugged in to an input or output channel. Plugging this cable in interrupts the signal and allows it to pass through an external piece of equipment before entering the rest of the sound board. When using an aux send to run signal processors, the signal is passed to both the effect and the main outputs. This allows mixing of the dry (uneffected) and wet (effected) signals. Multiple input channels can send to the same aux send, and thus share an effect such as reverb or echo. When a piece of signal processing gear is inserted, the signal is completely wet, as it passes entirely out of the sound board, through the effect, and back in. Inserted gear only works on the individual channel it was inserted on, and thus can not be shared. Figure 6.7 shows a diagram of aux send and inserted signal paths. Figure 6.7: The difference in signal path between using signal processing equipment with an aux send (top) and as an insert (bottom). Use of information in this document implies understanding and agreement with the copyright and terms of use. Specifically, no warranty is expressed or implied regarding the accuracy of the information contained within. YOU USE THIS INFORMATION AT YOUR OWN RISK. All trademarks are property of their respective owners. You must obtain permission from the author before using the contents of The Handbook for anything other than private use.	Table of Contents [Whole book in PDF 5.3MB] Contents Introduction Goals Sources Methods Conclusions Costumes Introduction Procurement Fabrics Color Patterns Fitting Rehearsal Clothing Design How to Begin Color Practicality Documents The Set Introduction Set Pieces Platforms Flats Stairs Rakes Other Structures Floor Coverings Construction Materials Tools Finishing Painting Types of Paint Mixing Paints Applying Paint Draperies Design How to Begin Documents Computer-Aided Design A Typical Set Construction at WPI Rigging Introduction Common Rigging Hardware Rope Wire Rope Thimbles, Wire Rope Clips, and Swages Shackles, Turnbuckles and Hooks Chain & Rapid Links Slings Fly Methods Non-Counterweighted Pulley Systems Counterweighted Fly Systems Lifts Chain Motors Flying Set Pieces Lighting Introduction Lighting Instruments Scoops Cyclorama Lights Parabolic Reflector Cans Fresnel Spotlights Ellipsoidal Reflector Spotlights Automated Instruments Color Color Theory Primary, Secondary and Complementary Colors of Light Light Mixing Practical Use of Color Glass, Gelatine and Plastics Dichroic Color Filters Patterns Dimmers Dimmer History Cables and Connectors Lighting Boards Control Design Washes Specials Cyclorama Lighting Color Lighting Angle Simulating Exteriors Lighting Design Paperwork Shop Order Instrument Plots Focus Sheets Computer-Aided Lighting Design A Typical Lighting Hang at WPI Audio Introduction Input Microphones Converting Sound to Electricity Directionality Analog Tape Digital Audio Tape (DAT) Compact Disc (CD) Mini-Disc (MD) Digital Samplers Computer Sound Cards Mixing Boards Signal Processing Equipment Equalizers Compressors and Limiters Noise Gates Effects Processors Output Power Amplifiers Speakers Crossovers Cabling and Connectors Line-Level Speaker-Level Automation Design Creating and Obtaining Effects Editing and Processing Effects Designing the Sound System The Input Section Signal Processing The Output Section A Typical Audio Setup at WPI Power Introduction Basic Theory Power Feeds Power Distribution Boxes Power Protection Important Considerations Special Effects Introduction Animated Costuming Smoke and Fog Pyrotechnics Acknowledgements References List of Figures Index About this document ...

Page last modified:

Copyright © 1993-2000 prefect - All Rights Reserved.