Archive for June, 2007

VIDEO: THE GOOD, THE BAD, THE UGLY

Filed under: — Gpetersen@mixonline.com @ 3:57 pm

By George Petersen

YOU DON’T HAVE TO WANDER FARTHER THAN YOUTUBE.COM to notice that video’s making a big impact on the web. Sure, the ‘net is filled with lots of funny clips, animations and occasionally even interesting bits, like the torture test of the Unitron waterproof computer keyboard. But there’s a serious side too…

On the Mix front, we’ve been incorporating video into our site for years, ranging from Seminars on Demand on topics such as Kevin Becka’s excellent series on studio miking techniques or technology previews like Taylor Guitars/Rupert Neve Expression Series or going backstage with the crew on the 2007 Snow Patrol tour. Just go to http://mixonline.com/video/ and you can find all this and more—including video highlights of past trade shows—AES, NAB, NAMM. And with the opening of Pixar’s Ratatouille, we’re going online tomorrow morning with an exclusive chat with the film’s sound designer extraordinaire Randy Thom—neat stuff!

There’s a whole lotta video going on around here with a whole lot more to come. That’s good. The bad part is trying to shop for some fairly simple HD camcorders that we can dole out to our editors for events like tradeshow coverage, where we need something lightweight, easy to use and capable of good quality picture and sound. That’s the ugly part. Picture-wise, there are plenty of low-cost models available that can handle the job, but getting decent audio from a consumer camcorder is like pulling teeth: Real ugly.

Today’s low-cost models tout features like 20x optical zooms (and the all-too-bogus 200x “digital” zoom functions), onboard effects, 720 HD picture quality, and storage to DV tape, hard disk, mini DVD and all manners of removeable media cards (SD, CF, Memory Stick, etc.) Yet at the same time, the attention to audio is deplorable. Here, I’m not even getting into the nuances of digital filter design or sampling rates or the quality of the onboard mics—or an almost total lack of manual controls for audio level. [Besides, there’s something VERY cinema verite about that blast of noise that appears when an AGC circuit pumps up the hiss or background noise during the pauses between sentences of dialog.] But what really kills me are the places where manufacturers locate these onboard mics. For some reason, the favored locations seem to be along the rear of the top panel–didn’t these companies ever consider putting mics on the FRONT of the camera, like maybe under the lens?

One model I looked at had the mics mounted on the back side of the flip-out viewscreen. On first glance, I thought this could be cool–the backside would form a quasi-boundary, giving you a semi-hemispherical pickup. However, it could get real ugly when the user tilts the viewscreen downward for low-angle shooting (pointing the mics at the floor) or when your hand partially covers the mics when holding the camera. Ugly, for sure.

Of course, it’s all fixable with an external mic, but finding a low-cost camcorder that has an external mic input (even 1/8-inch unbalanced) is not easy. But at least if you do, there are options, such as Rode’s VideoMic or Sennheiser’s MKE 300 shotguns or a simple Audio-Technica Pro 24 cardioid X-Y stereo. Yeah, I know there are much higher-end mics, but at least simple solutions like these will put you way ahead of the audio quality game.

And XLR inputs??? Fuggettaboutitt–at least in the sub-$2000 range. Certainly, there are other options, such as the cool XLR-to-minijack adapters from www.beachtek.com or the vintage PASS MD Report Jr. unit I’ve used for years. Heck, you could even go double system, and pack your fave location recorder, mixer, sound cart, booms, fishpoles, radio mics, shotguns and lavaliers. Sure, it’s a little bit of overkill when you’re shooting the kid’s birthday party on a $400 camcorder, but maybe that’s what real sound is all about…

When not working on Mix stuff, George Petersen records and performs with the SF Bay Area-based rock band ARIEL. Check ‘em out at www.jenpet.com.

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BIG NEWS FOR WIRELESS!

Filed under: — Gpetersen@mixonline.com @ 4:03 pm

By George Petersen

AFTER A LOT OF GLOOM/DOOM SCENARIOS for the future of pro audio wireless, a few streaks of blue are starting to break through the crowded clouds of RF. The problem stems from the February 2009 end of analog television and the possible loss of frequency bands for wireless mic use. Since pro wireless never had an “official” frequency allotment from the FCC, we’ve typically “borrowed” unused “white space” frequencies—essentially the guard-band easements between analog TV channels.

As digital TV has no such guard-band requirements, a cash-strapped FCC looks toward auctioning these unused frequencies to other industries, with a keen eye toward the burgeoning wireless Internet market. Once analog TV goes dark, vacant frequency bands in that region will be available as well, but to who is anybody’s guess.

Earlier this year, the congressional bill “H.R. 1320, The Interference Protection for Existing Television Band Devices Act of 2007″ was introduced by Representative Bobby L. Rush (D-IL) to protect the needs of pro wireless users in the face of possible interference from wireless Internet devices. The good news is House members Mark Steven Kirk (R-IL), Shelley Berkley (D-NV), Jim Cooper (D-TN), Jesse Jackson, Jr. (D-IL), and Carolyn B. Maloney (D-NY) have pledged their support for the bill.

It’s a start, but the pro audio community needs some more help. Encourage YOUR local representatives to support bill H.R. 1320. Best of all, it won’t cost you a dime and it’s even fun! Just go to www.house.gov/writerep, enter your state and zip code and an e-mail form pops up with your representative’s name. Let ‘em know that the possible loss of frequencies for wireless microphone use represents a major loss to users in the broadcast, sports, film/TV production, live entertainment, house of worship, business, government and educational markets.

AUDIO-TECHNICA SPECTRAPULSE

At InfoComm this week, Audio-Technica unveiled one possible solution to the white spaces issue. Ultra Wideband (UWB) technology has been used in military and government communications for years, and now A-T has applied this to offers near hard-wired performance without concerns about RF competition, frequency coordination, white space issues or infringement from other wireless sources.

Recently licensed for commercial use by the FCC, Ultra Wideband technology allows the wireless transmission of data in extremely short-duration pulses over a wide spectrum of frequencies. Rather than using conventional channels and carrier frequencies, UWB uses a series of short nano-second pulses that occupy an instantaneous bandwidth of 500 MHz within the 6 GHz frequency spectrum. In precisely timed sequences, the signals result in the reliable transmission of information at near noise-floor levels. And latency—always a concern with any digital system—is said to be a low 2ms.

A-T’s first UWB system is the SpectraPulse Ultra Wideband wireless microphone system, designed for conferences, courtrooms, corporate events and more. The first SpectraPulse products ship this fall, but there’s more information and a detailed white paper available at www.audio-technica.com. Check it out!

When not working on Mix stuff, George Petersen records and performs with the SF Bay Area-based rock band ARIEL. Check ‘em out at www.jenpet.com.

_______________________

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CLICK ON THE LINK BELOW AND SPEAK OUT!


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