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Thursday, May 23, 2013Chat From The Past: System Designer Craig Janssen On Measurement, Loudspeaker Design & More
PSW Staff 05/23/13 06:31 PM,Enjoy this lively PSW live chat session with noted sound system designer Craig Janssen of Acoustic Dimensions. It provides an interesting look at what was happening in the world of system design a decade ago, and much of what Craig addresses is timeless, regardless of specific gear. Moderator: Greetings Craig! And welcome, everyone, to the chat. Let’s get started. Charles: What analysis packages do you use for designing and tuning systems and why? Craig: For designing we use a number… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Loudspeaker • Measurement • Sound Reinforcement • Subwoofer -
Thursday, May 16, 2013Avoiding Poor Judgment & Getting A Handle On Subjective Audio
James Cadwallader 05/16/13 06:08 PM,I suspected trouble when I accepted responsibility for something I had no control over. There was a 50/50 chance of either being the hero or the whipping boy. I didn’t care for those odds, but I couldn’t change them. It all started when a friend of the family asked me to help make sure that the sound for his wedding didn’t ruin the ceremony. The catch was that I wasn’t handling the sound - his cousin, the part-time DJ, had… View this post
Filed in: Live Sound • Feature • Blog • Engineer • Measurement • Signal • Sound Reinforcement • System • Technician -
Square Waves And DC Content: Deconstructing Complex Waveforms
Charlie Hughes 05/16/13 05:56 PM,I’ve heard it argued by that square waves contain DC. How else could they have the flat top and bottom that make it square? Let’s look at a square wave and see what causes it to have its square shape. A complex waveform can be constructed from, or decomposed into, sine (and cosine) waves of various amplitude and phase relationships. This is the basis of Fourier analysis. A square wave consists of a fundamental sine wave (of the same frequency… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Measurement • Processor • Signal -
VUE Announces EASE Focus 2 And SystemVUE Software
PSW Staff 05/16/13 05:23 PM,With the al-4 Subcompact line array now shipping, VUE Audiotechnik has further revealed a technology roadmap that will bring immediate enhancements to the al-4’s capabilities while also foreshadowing broader technology initiatives to be unveiled at the upcoming InfoComm show in Orlando. Specifically, VUE has licensed a complete suite of acoustic measurement and modeling software from Berlin-based AFMG Technologies. Included are EASE Focus 2, SysTune, and AFMG’s FIRmaker technology. “As the undisputed leaders in acoustic measurement and room modeling, I’m tremendously… View this post
Filed in: AV • Live Sound • Church Sound • News • Product • AV • Line Array • Loudspeaker • Measurement • Monitoring • Software • Sound Reinforcement -
Tuesday, May 14, 2013The Bigger Picture On The Equalization Of Loudspeakers
Pat Brown 05/14/13 04:06 PM,The procedure often followed for equalizing a loudspeaker is to place the measurement microphone on-axis and adjust for the flattest frequency response. This often involves boosting some filters when the axial response over a range of frequencies is lower than the average. Those that are opposed to the use of boost filters may choose to arrive at the same resultant response by reducing (cutting) parts of the response to the lowest common denominator. This results in the same electrical curve,… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Loudspeaker • Measurement • Processor • Sound Reinforcement -
Monday, May 13, 2013The Relationship Between Amplifier Damping Factor, Impedance & Cable
Jerrold Stevens 05/13/13 03:21 PM,Ever have one of your friendly amplifier reps walk in your office to present their new mondo-gazillion-watt beast and point out the damping factor spec of greater than a bazillion? Why, gee-whiz! That’s like 10 times more than the other guy! It must be awesome! Right? Well, as we have seen before, it depends on how you are going to use it. Let’s start with defining damping factor and see what it means to us. Amplifier damping factor is defined… View this post
Filed in: AV • Feature • Blog • Study Hall • Amplifier • AV • Interconnect • Loudspeaker • Measurement • Signal • Subwoofer -
Tuesday, May 07, 2013Tools of the Trade: How Boundaries Affect Loudspeakers
Pat Brown 05/07/13 05:16 PM,It’s nearly impossible to mount a loudspeaker in a room without placing it near a room boundary. Some logical questions arise: 1. Does this affect the response? 2. Is the effect good or bad? 3. Can I use the boundary to my advantage? 4. Will treatment help? And, can room boundaries be a “tool of the trade”? Space-Loading Space-loading loudspeakers means that the otherwise spherical radiation is limited by a boundary or boundaries. Some common scenarios are shown in Figure… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Line Array • Loudspeaker • Measurement • Signal • Sound Reinforcement • Subwoofer -
FOH Engineer Marko Hunt Relies On SpectraFoo Analysis Software From Metric Halo
PSW Staff 05/07/13 11:42 AM,Marko Hunt is closing in on four decades behind the mixing console, and he has spent the last thirty-two of them with The Oak Ridge Boys – first at monitors and then later at FOH. Before securing that enduring gig, Hunt cut his teeth touring with the Little River Band in its heyday. He also spent several years touring with Johnny Cash. After all those countless gigs in the innumerable venues of the nation and the world, he hears music… View this post
Filed in: Live Sound • News • Concert • Measurement • Microphone • Software • Sound Reinforcement -
Monday, May 06, 2013Kaltman Creations Unveils RF-Vue Handheld Touch-Tablet RF Spectrum Analyzer
PSW Staff 05/06/13 02:00 PM,Kaltman Creations has introduced the new RF-Vue, a handheld touch-tablet RF analyzer under the company’s Invisible Waves brand, and it will be on display at the upcoming InfoComm 2013 show in Orlando. RF-Vue is offered in several versions, with the RF-Vue T10 serving as the flaship model. This handheld unit is integrated into a 10-inch touch-tablet with the Windows 8 operating system. It covers the standard wireless microphone and IEM frequency range of 470 MHz to 700 MHz. Additional models… View this post
Filed in: AV • Live Sound • Church Sound • News • Product • AV • Measurement • Microphone • Monitoring • Signal • Wireless -
Thursday, April 18, 2013Making It Match: An Introduction To Transformers In Audio Devices
Ken DeLoria 04/18/13 06:01 PM,In the dawning days of audio, transformers played a vital role in the functionality of first-generation all-tube based electronic circuitry. It was circa 1920 and radio broadcasts for the general populace had just begun, generating a rapid rise in the demand for broadcast audio systems, all of which needed transformers to function. Later, as equipment for live sound reinforcement began to emerge, transformers again proved indispensible as the only means of matching microphone impedances to vacuum tube preamplifiers. Transformers were… View this post
Filed in: Live Sound • Feature • Blog • Study Hall • Amplifier • Education • Measurement • Processor • Signal • System
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