Barry Willis

It's five years from now. Wide bandwidth has made audio-on-demand as commonplace as ATM machines and cellular phones were in 1999. Music lovers can plug into the Internet from almost anywhere and download any tunes they wish to hear anytime they wish to hear them for only pennies per song. Portable devices the size of wristwatches contain entire libraries of music. Picture frames, computer screens, and ceiling tiles all double as loudspeakers. Intuitive programs suggest personal playlists based on databases of prior requests. People are awash in a sea of music.

High-end digital audio's rapid advancements are pushing integrated circuit designers to exceed their previous limits. San Diego-based AKM Semiconductor has joined the chip elite with two new digital-to-analog devices that further push the performance envelope. The AK4394 is a 24-bit/192kHz stereo DAC based on Asahi Kasei Microsystems' advanced multi-bit delta-sigma technology. Its sibling, the AK4356, is a 24-bit/192kHz, six-channel DAC based on the same technology, but boasting a useful and fascinating array of features.

How would you like to make a full 650Mb compilation CD of your favorite music in less than 10 minutes? That's what TDK is promising with its new veloCD ReWriter drive, to be shipped to dealers later this fall.

The Walkman is 20 years old. As part of its celebration of one of the most successful audio products in history, Sony has introduced its first personal music player with the capability of downloading music from the Internet. The new Walkman employs Sony's "memory stick" technology to store audio files as large as 32 megabytes. The latest Walkman, which was unveiled last week in Japan and New York, is expected to retail at approximately $400 and should appear in stores in January.