The live-audio.com StudyHall
Subjects covered in the Study Hall include..............
Most recent additions.........
- Benefits of Series Mode Surge Supression Submitted by SurgeX, written by one of the most respected and knowledgeable persons in areas regarding noise in audio systems, Neil Muncy. This paper provides a basic primer on how surge suppression works, over a couple of different formats and implementations. It explains the way MOVs work, and the advantages of series mode surge suppression in audio systems.
(
.pdf format, file size 24k, 5 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Viewing Impedence with SIA Smaart Submitted by Dr Don. This paper shows how to view impedence with SIA Smaart software, using a simple circuit.
(.pdf format, file size 5k, 1 page) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- To Solder or Crimp? and other great tech notes, from the "Ask Dr. Don" series at SIA Software's support site. Submitted by Doug Fowler, written by touring legend "Dr" Don Pearson. Among the articles here, is a great piece on what happens when you solder a multipin contact. Other articles include a primer on using SIA Smaart products (Smaart Pro 3.X specifically) on a Macintosh using Windows software emulation. Bookmark this link! This is a link to an external site, it will open in this window, full size.
- "Q" to Bandwidth Conversion Chart Submitted by Chuck McGregor. This chart will assist in converting "Q" to bandwidth. Very useful for configuring DSP system controllers.
(.pdf format, file size 12k, 1 page) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Noise Induced Hearing Loss Submitted by Dave, issued by the US National Institutes of Health. This is a report that defines and explains noise induced hearing loss, a common hearing impairment in the pro audio business.
(.pdf format, file size 39k, 21 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Making Fixed Resistive Attenuators Submitted by Chuck McGregor. This paper will show you how to calculate and build a resistive attenuator, often called a passive pad.
(.pdf format, file size 304k, 4 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Constant Voltage Damping Factor Calculator Submitted by Ray Rayburn. This spreadsheet calculates damping factor for constant voltage systems (eg. 70 v installed systems). This spreadsheet was written to be used in Microsoft Excel 4.0. Tested in Office/Excel 98.
- Low Impedance Damping Factor Calculator Submitted by Ray Rayburn. This spreadsheet calculates damping factor for low impedance systems (eg. typical portable and club systems). This spreadsheet was written to be used in Microsoft Excel 4.0. Tested in Office/Excel 98.
- Gain Structure Basics Submitted by Chuck McGregor. This is a basic primer for one of the most frequently asked questions by those new to audio theory, gain structure. This is a easier to digest version of the compreshensive gain structure article below. It includes easy to follow, real world directions to help setting your gain structure.
(.pdf format, file size 39k, 3 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Impulse Alignment, Part 1 Submitted by "Dr Don", Don Pearson. Written by Don and Tom Lubin. Originally published in R.E.P mag in 1978, the information still holds true today, 22 years later.
(.pdf format, file size 312k, 7 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Impulse Alignment, Part 2 Submitted by "Dr Don", Don Pearson. Written by Don and Tom Lubin. The second part of the Alignment Impulse article.
(.pdf format, file size 388k, 7 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Polarity and Phase Explained Submitted by Study Hall Editor Emeritus, and all around great guy, Chuck McGregor. Polarity and Phase are not the same thing, this well written paper explains why.
(.pdf format, file size 131k, 11 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Basic Audio Math, **Revised January 2000** This paper, by Chuck McGregor, is a quintessential primer on basic audio math functions involving the decibel. Even if you hated math in school, you should be familiar with these concepts.
(.pdf format, file size 87k, 9 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Crossover Basics Submitted by Rik Kirby, Brooke Siren Systems.
(.pdf format, file size 428k, 8 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- SIA Software Technical Document Archives Submitted by Sam Berkow, SIA Software, Inc. (link to external site, opens in new window) This is a great resource for information relating to the measurement of audio systems. It mainly deals with applications of the Smaart Pro FFT software (published by SIA), but the principles and applications provide an excellent reference for measurement information in general.
- Damping Factor, how it works. By Chuck McGregor **Revised January 2000**
(.pdf format, file size 128k, 4 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- How to set up your gain structure.Reposted, updated graphics. By Chuck McGregor
(.pdf format, file size 77k, 13 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- How many watts for this loudspeaker. By Chuck McGregor
(.pdf format, file size 9k, 2 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Fusing Loudspeakers By Mark Mattson.
(.pdf format, file size 10k, 2 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Driving Looooong Lines By Chuck McGregor.
(.pdf format, file size 15k, 5 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Practical Setting of Gain in A Sound System By John Murray and Pat Brown. Presented at the 1997 Live Sound Workshop. Another method to set gain structure. Originally posted on Compuserve in Feb of 1997.
(.pdf format, file size 20k, 6 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Clipping, what it is, why it's bad By Chuck McGregor
(.pdf format, file size 5k, 1 page) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
- Practical Setting of Equalization in a Sound System By John Murray. Presented at the 1997 Live Sound Workshop. Originally posted on Compuserve in Feb of 1997. [Publisher Note that some of the graphics and chart data refered to in the articles did not convert. We are looking for the original data]
(.pdf format, file size 29k, 9 pages) You will need Acrobat Reader to view this file. If you don't have Acrobat Reader click here to download.
Look for more topics to be added. The live_audioStudyHall contains articles that apply specifically to the live_audio population.
The Keeper of the live_audioStudyHall is Doug Fowler,dougfowler@ibm.net. Direct any StudyHall inquiries to Doug.
The Editor Emeritus, is Chuck McGregor.
The Publisher and Enforcer of the StudyHall is Dave Stevens, dstevens@roaddog.com