Nice little article on one of our regular engineers: Betty Cantor-Jackson.
[Grateful Dead Road Crew: 1977]
[Grateful Dead Road Crew: 1977]
For those of you lost in the whole Audio Codec conundrum, here is a link with a simple breakdown of the different types. – Sean Barber
Media One A/V frequently works with our close friends from San Diego, All Star Media, owned by David Lee Joy. Here’s a link to one of David’s blogs re: our collaboration for the 2011 Craft Brewers Conference in San Francisco. T’was a couple of days of fun recordings and gooood beer!
Media One’s recordings of the “Future of Money & Technology Summit” from February 28, 2011 are available at the link below. This event was at the Hotel Kabuki in San Francisco and with LOTS of very interesting panelist sharing information regarding how we will access and spend our money in the future. Check it out…
See the photos here:
HI, today I’m going to write a little bit about wireless microphones. Other than projectors, wireless mics can be one of the most temperamental items of gear you will use on an A/V gig. Heck, just last Sunday at Glide, we had our wireless hand-held completely drop-out due to the antenna simply falling over – and these were UHF true diversity microphones! So let’s jump right into it. I’ll first start with some basic characteristics of wireless systems and then go from there…
Wireless mics can transmit in radio waves using UHF or VHF frequencies, FM, AM, or various digital modulation schemes. Some low cost models use infrared light and require a direct line of sight between the microphone and the receiver, while costlier radio frequency models do not. Some models operate on a single fixed frequency, but the more advanced models operate on a user selectable frequency to avoid interference, and allow the use of several microphones at the same time much like in the pictures to the right of this text.
The professional models transmit in VHF (Very High Frequency) or UHF (Ultra High) radio frequency and have “true diversity” reception (two separate receiver modules each with its own antenna), which eliminates dead spots (caused by phase cancellation) and the effects caused by the reflection of the radio waves on walls and surfaces in general. In the United States, the FCC has banned devices to operate in the 698–806 MHz portion of the frequency spectrum due to their auction of the 700 MHz band to broadcasters, cable networks, television and film producers.
Digital Hybrid systems are now available and use an analog FM transmission scheme in combination with digital signal processing (DSP) to enhance the system’s audio. Pure digital systems take various forms as some systems use “frequency-hopping spread spectrum” technology, similar to that used for cordless phones (think: relay towers you see everywhere for your wireless phone). As this can require more bandwidth than a wideband FM signal, these microphones typically operate in the 900 MHz, 2.4 GHz or 6 GHz unlicensed (also known as de-regulated or licence exempt) bands.
Media One just purchased the Shure PGXD 24/Beta 58A digital wireless and we like the results so far.
And despite their “true diversity”, when working with wireless microphones, I always try and make sure the receivers have a clear line of sight to the transmitting microphone. I know the products claim they work behind closed spaces, doors or can pass through cement or wooden walls, but it has been my experience that when the receiver does not have a clear line of site to the transmitting hand-held or lavaliere microphone, you introduce “dead spots” in the transmission and drop-outs occur. This is purely from my personal experience as I am not providing technical data to support this claim. Also make sure your antennas are fanned-out much like in these photos. It just helps the frequency finds its home without having to go through more clutter.
I hope this information was helpful. Happy gigging!
PS Media One acknowledges Wikipedia for some of the technical information provided in this blog.
- by Darkstar Dan
Media One has partnered with old friend David Lee Joy of All Star Media to record every minute of the 2011 Unified Wine & Grape Symposium in Sacramento, CA. This is the largest wine and grape conference in the nation and twelve-thousand industry professionals attended this year’s conference. We record this symposium because, as taken off their website, “the conference represents the collective experience, knowledge and background of the entire industry. We collaborate with a diverse committee of industry and academic professionals to bring you a program with timely topics and compelling speakers.”
For me personally, I was proud to see my Alma Mater, University of California – Davis, well represented and at the forefront of developing technology beneficial to the growth, harvesting, and processing of grapes and related crops within this multi-billion dollar, world-wide industry. UC Davis was touting their brand new sustainable winery, brewery and foods complex which opened on January 28, 2011. The new, 34,000-square-foot teaching and research complex, located within UC Davis’ Robert Mondavi Institute for Wine and Food Science, is the world’s most environmentally sophisticated facility for making wine, brewing beer and processing foods.
The sustainable winery building will enable the teaching and research winery to demonstrate how a winery can operate on rainwater when it captures, filters and reuses that water many times. The planned building also will house equipment needed to sequester the carbon dioxide captured from the winery’s fermentation system, thus preventing damage to the atmosphere. This is expected to make it the first winery to have a net-zero carbon footprint, meaning that it captures and sequesters at least as much carbon dioxide as it produces.
I was attending U.C. Davis when they started the construction of this facility and would wonder what it would all look like when finished. Now I’ll take a ride over and check it our for myself. And yes, for anyone wondering, I attended college a little later in life. It was weird being almost the same age as some of my professors!
All in all, the Wine & Grape Symposium was a successful and fun event. There is always new information to be learned at these conferences, lots of interesting people to meet, and some delicious wine to be tasted (a great perk of the job!)
Well, that’s our update of what we’re up to lately. Hope everyone is staying busy and healthy out there. And remember, no matter what is happening in your work or personal life at this moment, my dad used to say to me, “It’s not where you are today that matters, it’s where you see yourself going”.
I say let’s reach for the stars…
Click on the following link to hear our “San Francisco Music & Technology Summit 7″ recordings from December 06, 2010 at the Hotel Kabuki.
And to learn more about John Meyer & Meyer Sound Labs, click on the following link:
Media One Audio is producing and editing the weekly Sunday Celebrations for Rev. Cecil Williams & the world-famous Glide Memorial Church in San Francisco. Here is the link for the weekly Podcast:
Media One A/V will be providing the Audio, Visual and Recording Services for the prestigious SF MusicTech Summit 7 on December 6, 2010 at the Hotel Kabuki in San Francisco.
“The SF MusicTech Summit brings together visionaries in the music/technology space, along with the best and brightest developers, entrepreneurs, investors, service providers, journalists, musicians and organizations who work with them at the convergence of culture and commerce.”
To see the SFMT 7 line -up, Click on the following link:
To hear our recordings from SFMT 6, click on the following link: