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THX Media Director
Tom Andry
— last modified January 08, 2008 12:32
THX Ltd. today introduced THX Media Director, formerly codenamed “Blackbird,” to simplify home theater set-up and operation. THX Media Director will enable movies, music and other digital media to communicate picture and sound settings directly to consumer electronics devices, dynamically configuring them for the best playback experience.
CD Compression Depression Music Industry Idiocracy
Dan Banquer
— last modified November 12, 2007 18:28
Imagine, if you can, going to Paris to see the Mona Lisa. You wait in line for hours only to come to what appears to be a postcard of the Mona Lisa placed where the original had been. You ask the museum staff what happened to the original and you are told that this representation is what is required for the commercial success of the painting. Totally disgusted, you walk out with a severe case of what I call Compression Depression. The music industry as of late seems to be no different as they pump up the output levels and lay on the compression to play into the LOUDER is better mentality.
Craig Eggers is interviewed by our own Gene DellaSala to discuss the next generation AV receivers and HD/Blu-ray DVD players which enable the user to have an experience in the home that is equivalent to the studio masters. Dolby discusses the upcoming Audioholics State of the CE Union event where Dolby and AIX Records will be doing an impressive 7.1 demo. Craig also clears up some misconceptions about Dolby TrueHD.
Dolby Labs CES 2007 Video
Clint DeBoer
— last modified November 21, 2007 15:31
Craig Eggers talks to us about Dolby Labs new technologies that are part of the high definition audio and video formats hitting the consumer electronics market including Dolby TrueHD and Dolby Volume.
Understanding Surround Sound Production
Patrick Hart
— last modified December 05, 2004 19:00
When our friends at DTS offered to fly me to San Francisco to cover a seminar they were putting together, I was intrigued. From it's somewhat generic sounding title I was at a loss to figure out how this seminar presentation would play out.
I first became aware of this issue back in the early 90's when I was testing a DAC that used a Burr-Brown Digital Filter and D/A Converter. I observed that the 1kHz square wave test from CBS CD1 test disc was being clipped. I knew that the analog low pass filter had plenty of headroom, so I decided to contact Burr-Brown and speak to an applications engineer. When I explained to the applications engineer exactly what I was observing he remarked that this test went over the 0 dBFS limit and was clipped by the digital filter.
When you make a digital recording, an analog waveform (represented by an electrical signal with a continuously varying voltage) is sampled at regular intervals and converted to a set of numbers. Each number, or digital sample , correspond the voltage of the electrical signal at a specific point in time. These numbers are stored in binary form with a specific word size (typically 16-24 bits). The minimum and maximum numbers that can be stored depends on the word size, and corresponds to the voltage range of the electrical signal.
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