In his article on the future of audio engineering in this issue, John La Grou tells us—succinctly and correctly, I think—that we are rapidly moving from a culture of handheld devices to one of headworn devices. He postulates that by perhaps as early as 2025, rather than being actively sought out, most audio/video media will be delivered, like milk or the newspaper—but delivered not to our front doors, but more or less straight to our brains. Fascinating? Sure. Frightening? Kinda, yeah.

I know this will come as a huge shock to music fans the world over

Back in the summer of 2009, USB-connected D/A processors that could operate at sample rates greater than 48kHz were rare. Ayre Acoustics had just released its groundbreaking QB-9, one of the first DACs to use Gordon Rankin's Streamlength code for Texas Instruments' TAS1020 USB 1.1 receiver chip. Streamlength allowed the chip to operate in the sonically beneficial asynchronous mode, where the PC sourcing the audio data is slaved to the DAC. But high-performance, USB-connected DACs like the Ayre were also relatively expensive back then, so in the January 2010 issue of Stereophile I reviewed a pair of soundcards from major computer manufacturer ASUS , the Xonar Essence ST and STX, which, at $200, offered a much more cost-effective means of playing hi-rez files on a PC.