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A/V features

  • Monday, September 26, 2011
    image
    Christopher Lyons 09/26 06:27 PM,
    In the world of audio, one tends to wear many different hats from day to day. While you may be a Front of House guy, it’s not out of the realm of possibilities to be assisting with audio/video sound either in your free time or on a job. Whether a seasoned soundman or a volunteer just getting your bearings, the following are some good hints on choosing the right mics for some common audio/video applications. In most situations, there is… View this story
    Filed in: AVFeaturePollStudy HallProductionAudioVideoAVDigitalEducationEngineerMicrophoneSound ReinforcementStudioTechnician

  • Friday, September 23, 2011
    tech package
    Mark E. P. (Milo) Woods 09/23 04:01 PM,
    The technical information package often provides the first contact that a touring sound crew has with a given performance facility. This is often called “advancing the show,” and can be vital to the success (or failure) of both sound quality of the production, as well as addressing important factors such as the speed and efficiency of the system load-in and set-up. In a perfect world, the sound mixer/designer for a touring production will receive a copy of an in-depth description… View this story
    Filed in: AVFeatureStudy HallAVBusinessConcertMeasurementSound ReinforcementSystemAudio

  • Thursday, September 22, 2011
    measurement
    Pat Brown 09/22 04:28 PM, 0 Comments
    Here’s a simple way to construct an irrefutable polarity test rig to check out your measurement system: 1) Get two small cone transducers to use as a reference – the simpler the better. 2) Momentarily connect a 9V battery (+ to + and – to -) to each loudspeaker. 3) The loudspeaker cones should move away from the magnet. 4)  Check all of your measurement audio interconnect cables for proper polarity with a cable tester. I use simple twisted pair… View this story
    Filed in: AVFeaturePollAVLoudspeakerMeasurementSignalAudio

  • Wednesday, September 21, 2011
    amplifiers
    Tommy O’Brien 09/21 12:57 PM,
    Among lesser-known amplifier classes – yet viable and employed in pro audio applications - are Class-G and Class-H topologies. Unlike some of the “hybrid” designs touted as “unique” topologies by some in the amplifier development community, these two designs are fairly distinct. That said, there is some disagreement among the amplifier “experts” on the exact definitions of Class-G and Class-H. For purposes of general discussion, when more than one voltage rail is employed, or a pair of rails is used… View this story
    Filed in: AVFeaturePollAmplifierAVPowerSignal

  • Tuesday, September 20, 2011
    digital consoles
    Craig Leerman 09/20 02:37 PM,
    Having a roomful of high-qualify professional audio gear is great, but it’s not a system until you can connect everything together. The hub for system interconnectivity is the mixing console, nowadays usually a digital model. While digital consoles save us the time and cables in not having to hook up racks full of EQs, effects processors, gates, and compressors, there are still a multitude of signals flowing to and from the console that all need to be connected. Typical inputs… View this story
    Filed in: AVFeaturePollProductSlideshowAVConsolesDigitalInterconnectMonitoringNetworking

  • Friday, September 16, 2011
    prosoundweb a/v
    Dennis A. Bohn 09/16 01:59 PM, 0 Comments
    This article is provided by Rane Corporation. In the USA, in spite of all the hoopla about digital-this, digital-that and fiber-optic-whatever, the truth is that many small commercial paging and music-on-hold applications still involve interfacing with the plain old telephone service, or “POTS”. (By contrast, if you work in the EU business place, then you will rarely run into POTS, since it has almost all been converted to ISDN.) Meanwhile, back in the USA: if you are lucky, the telephone… View this story
    Filed in: AVFeaturePollAVInstallationInterconnectAudio

  • Thursday, September 15, 2011
    amplifiers
    Pat Brown 09/15 08:42 AM,
    Click here to view/download a printable pdf of this article. I’ve done enough theorizing and musing about power and power ratings in part 1 and part 2 of this series. Let’s convert some utility power into audio power. First, some details about the testing. The Source, The Load “Source” and “load” are usually associated with amplifier and loudspeaker. I had to zoom out another level and consider the AC source to the amplifier (these amplifiers need a lot of juice).… View this story
    Filed in: AVFeaturePollProductAmplifierAVInterconnectMeasurementSignal

  • Wednesday, September 14, 2011
    crossovers
    John Lenard Burnett 09/14 10:03 AM,
    This article is provided by Lenard Audio.   Read John’s introduction to crossovers here and his discussion of passive crossovers here. Active systems can be 2-way, 3-way, or 4-way.  The line level signal from the preamplifier or mixer is electronically filtered into the correct frequency bands to be sent to independent amplifiers that drive the bass loudspeaker, mid loudspeaker and tweeter separately.  The auditory difference between an active and passive loudspeaker system is noticed by everyone. A correctly set up… View this story
    Filed in: AVFeaturePollAVEducationProcessorSignalAudio

  • Tuesday, September 13, 2011
    qsc
    Greg DeTogne 09/13 01:25 PM, 0 Comments
    Building quietly and moving with unstoppable force downfield just like the University of Alabama’s Crimson Tide, audio for Bryant-Denny Stadium found new strength this year just prior to the kickoff of the NCAA college football season. Now capable of seating 101,821 fans, the venerable stadium has undergone a continuing series of renovations since 1998 that concluded in 2010 with an expansion of seating above the south end zone. This latest renewal effort effectively closed the open-air bowl on all sides,… View this story
    Filed in: AVFeaturePollAmplifierAVInstallationLine ArrayLoudspeakerNetworkingProcessorSound ReinforcementAudio

  • Monday, September 12, 2011
    sound card
    Pat Brown 09/12 05:36 AM,
    The personal computer is frequently used as a program source for sound reinforcement systems. Internal sound cards can be pretty good and software wave file players abound. A common question is “Where do I set the output level of my PC for optimum results?” The answer can vary per PC, so here are some steps to help figure it out for yours. I will assume that WAV files are being used, but this applies to any audio file format. Sound… View this story
    Filed in: AVFeatureAVInterconnectNetworkingProcessorSignalSoftwareAudio