Forty years ago, as I was starting out on my audio journey, I railed against the flashy mainstream audio gear of the day. To me less was more, and I tried to convince my friends that my small, austere British-made audio rig, including what my friends jokingly called my Lynn Swanndek turntable (after the Steelers wide receiver), really did sound much better than their big silvery Japanese stacks loaded up with shiny knobs, switches, and meters. Audio was all about the sound after all, and I wasn't interested in some dazzling visual display that had nothing to do with what I was hearing. I gravitated toward gear that wasn't flashy or fancy looking, feeling that meant that the effort and expense to create it went where it counted most, to the parts that made it sound great.

This paragraph from Linear Tube Audio's website description of their new Aero DAC sets the tone for the story I'm about to tell. "After trying various options, we chose the Analog Devices AD1865 R2R DAC chip, which is sometimes called the 'vinyl DAC,' for its organic sound. It is a non-oversampling DAC, with no digital filters. The AD1865 is much-loved by audiophiles and is used by at least one hi-fi company in a flagship DAC costing over $150,000."

Check the forums and you find that the AD1865 chip is also a heavy DIY favorite. Home brewers are attracted to this discontinued, "obsolete" 18-bit chip for its easy implementation and unprocessed, music-friendly sound.