![]() When we hear something we cannot measure, we are not doing the right measurements. We have to tell it exactly what to measure and how to measure it. An APx555 test set has far more resolution than human hearing, but it has no intelligence. But since listening tests are never perfect, it’s essential we develop measurements for each artifact we identify in a listening test. His essay “Rules of Thumb for Music and Audio,” which combines useful information, solid practical advice, and wise counsel, will enlighten both tyros and seasoned audiophiles and reviewers ().īenchmark publishes by far the most exhaustive technical information about its products yet listening also plays an important part in your product design and development.Īt Benchmark listening is the final exam that determines if a design passes from engineering to production. In the interview that follows I’ve interpolated links in to articles that elaborates on certain subjects he covers. Siau’s many white papers and other pieces about audio are well worth investigating on the Benchmark website. They own a farm, which they lease, though they do enjoy working it from time to time. Away from Benchmark, his musical training includes trumpet and tuba he is an avid skier and he and his wife have a large family who on vacations enjoy exploring remote trails and locations. Soon afterward he joined the company full time, eventually becoming part owner. In 1995 Benchmark hired him to design its first digital product, the AD2004, a 20-bit A/D converter that set new standards for low distortion and won some awards. The fifteen years following his graduation include long stints at CBS and General Electric, plus independent consulting, through all of which he acquired extensive experience in HDTV (receiving two patents for video-image stabilization systems) and developed high expertise with high-speed A/D and D/A converters, ultra-low-jitter phase-locked loops, high-speed digital logic, digital filters and FPGA cores. Along the way he’d cobbled together an audio system and worked as the sound engineer and mixer for a local band. He enrolled at Syracuse University in 1976 and graduated four years later with a bachelor’s degree in Computer Engineering. John Siau, Director of Engineering and chief designer at Benchmark Media, knew from an early age that he wanted to design electronic equipment. ( The following interview accompanies Paul Seydor’s review in the December, 2020 issue of the Benchmark Media Systems LA4 Line Amplifier and DAC3 B Digital-to-Analog Converter.)
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