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Wednesday, March 06, 2013Analyze That: What FFT Measurement Actually Means
Ken DeLoria 03/06/13 10:57 AM,Last time out (here), we looked at early forms of audio measurement equipment, including chart recorders, heterodyne analyzers, and real-time analyzers (RTAs). Now let’s pick it up with fast Fourier transform analyzers (FFTs), which are still in widespread use the world over in a variety of forms. In addition to accurately characterizing audio signals, FFTs are used for vibration analysis, order analysis of rotating machinery, RF and microwave measurements, and many other purposes. One could say they’re the gold standard… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Measurement • Signal • Sound Reinforcement -
Primacoustic Acoustical Product Line Now Available In Sketchup Library
PSW Staff 03/06/13 09:57 AM,The full line of Primacoustic acoustical treatment products can now be found in Sketchup’s Component Library/3D Warehouse, a modeling program that is widely used by designers in a variety of fields to create layouts and models. Primacoustic product specialist Jay Porter says, “Primacoustic has been using the software to assist with acoustic treatment layouts for customers and for product design for over three years, and has amassed a collection of 53 Sketchup models representing our entire product line. “Sharing these… View this post
Filed in: AV • Live Sound • News • Product • AV • Measurement • Signal • Software -
Monday, March 04, 2013PreSonus Offering Free PRM1 Reference Mic With Purchase Of StudioLive 24.4.2
PSW Staff 03/04/13 11:56 AM,PreSonus is celebrating the release of Universal Control 1.7 with integrated Rational Acoustics Smaart audio analysis and optimization software by offering a free PRM1 precision reference microphone with the purchase of a StudioLive 24.4.2 digital mixer. The offer runs from March 1 to May 31, 2013. The PRM1 mic normally lists for $99, U.S. Smaart Measurement Technology provides a spectrograph and real-time analyzer (RTA) that lets the user see, graphically, what’s going on with the mix, fostering quick fixes of… View this post
Filed in: AV • Live Sound • Church Sound • News • Product • AV • Business • Consoles • Measurement • Microphone • Mixer • Signal • Software -
Thursday, February 28, 2013QSC Releases EASE.GLL Data Files For Entire Loudspeaker Line
PSW Staff 02/28/13 04:43 AM,QSC Audio has announced the release of complete EASE .GLL data files for its entire loudspeaker line, including AcousticDesign, Acoustic Performance, K Series, KW Series, KLA Series, WideLine and others. “Unlike legacy file formats such as .efo, .spk, and .dll, these new .GLL files can work across all three popular platforms; EASE Address, EASE Focus 2, and the full 3D modeling version of EASE 4.3,” states David Fuller, QSC director of technical marketing. “This has been a great effort from… View this post
Filed in: AV • Live Sound • Church Sound • News • Product • AV • Line Array • Loudspeaker • Measurement • Software -
Tuesday, February 26, 2013An Examination Of Bandwidth, Dynamic Range And Normal Operating Levels
John Eargle & Chris Foreman 02/26/13 05:12 PM,Audio signals are, of course, speech and music, and in this article we will examine the nature of those signals in terms of their requirements in bandwidth, dynamic range and normal operating levels. The nature of peak and average levels of music and speech will be discussed. In addition, we’ll look at the standard methods of dealing with signal peaks and required shifts in signal operating levels. AUDIO SPECTRA The data of Figure 1 shows the approximate limits of bandwidth… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Loudspeaker • Measurement • Processor • Sound Reinforcement -
Thursday, February 14, 2013L-Acoustics Introduces Loudspeaker Modules For CATT, EASE, ODEON & LARA
PSW Staff 02/14/13 06:45 PM,L-Acoustics has announced that new modules are now available for third party software, including CATT-Acoustics (Dynamic Link Library - DLL), EASE (Generic Loudspeaker Library - GLL), ODEON and LARA. Sound designers and acousticians can now simulate L-Acoustics’ line source arrays via specific GLL or DLL files for the electro-acoustic software EASE and CATT-Acoustics, respectively. L-Acoustics coaxial speakers can also be simulated using the dedicated GLL file in EASE and the Common Loudspeaker Format (CLF) file for CATT-Acoustics, ODEON and LARA.… View this post
Filed in: AV • Live Sound • Church Sound • News • Product • Production • Audio • AV • Line Array • Loudspeaker • Measurement • Software -
Thursday, February 07, 2013Conversations: Catching Up With RF Engineer Barry Macleod
Paul Watson 02/07/13 06:28 PM,British RF engineer Barry Macleod has had a long and distinguished career in rock ‘n’ roll, looking after wireless systems at major international events such as Live 8 and Live Earth, as well as a plethora of BRIT Awards and MTV Awards ceremonies. I recently spoke with him about his latest project, the touring version of Andrew Lloyd Webber’s Jesus Christ Superstar (JCS), which will hit U.S. arenas in the coming months. Paul Watson: The JCS tour required 50 channels… View this post
Filed in: Live Sound • Feature • Blog • Engineer • Measurement • Microphone • Sound Reinforcement • Technician • Wireless -
Tuesday, February 05, 2013Understanding High And Low Impedance Signals
Al Keltz 02/05/13 03:49 PM,The output from most electronic devices in an audio system will be of low impedance in nature, usually 150 Ohms or less. However, the output from many passive devices, such as a high impedance microphone or passive guitar pickup can have much greater output impedance. What’s the difference and why is it important to know how to deal with these signals in an audio system? Impedance (Z) is the measure of the total opposition to current flow in an alternating… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Interconnect • Measurement • Power • Signal • System -
Thursday, January 31, 2013Analyze This: The Evolution Of The Audio Analyzer
Ken DeLoria 01/31/13 01:30 PM,This is the first installment in a series that will explain how various types of audio analyzers function, how they differ in capability and usage, and the way that the test and measurement industry has evolved over the past five decades. Way, way back in time, graphical acoustic measurements were acquired by means of chart recorders. A chart recorder looks a lot like the lie detector seen in old-time movies and is analogous to a mechanical version of a CRT… View this post
Filed in: AV • Feature • Blog • Study Hall • Production • Audio • AV • Engineer • Loudspeaker • Measurement • Processor • Signal • Sound Reinforcement -
Wednesday, January 30, 2013Energy & Exposure: Presenting the Audience With The Optimum Balance
Dave Rat 01/30/13 06:14 PM,I enjoy seeking parallels and connections between various aspects of the world that surrounds us in search of clarifying analogies. One of those connections occurred to me not long ago while doing one of my sound seminars. I was looking for a way to clearly explain the theories I implement when equalizing live sound systems. Though mixing a live event can be a complex process with many factors that need to be simultaneously juggled, it’s possible to look at mixing… View this post
Filed in: Live Sound • Feature • Blog • Production • Audio • Consoles • Engineer • Measurement • Mixer • Signal • Sound Reinforcement
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