JVC DAS-900
A 2-channel PCM mastering system that put CD-master editing in the hands of anyone with a trained ear.
Overview
The DAS-900 was not a single box you carried under one arm. It was a system, and JVC sold it that way. According to contemporary coverage, the company displayed the DAS-900 as a digital audio mastering system assembled from independent digital audio editors, mixers, and processors, along with peripherals including timecode units, interfaces, AV synchronisers, and remote control units. The core was a 2-channel PCM system aimed at professional recording, editing, and mastering. It worked across a spread of media, VHS tape and CD-ROM among them. This was infrastructure for a mastering room, not a consumer gadget.
The sample rates were the numbers that defined it. EQ magazine's survey of digital formats noted that the JVC DAS-90 and DAS-900 machines could record at either 44.1kHz or 44.056kHz. 44.1kHz is the standard for CD masters. 44.056kHz is what you use when the digital audio has to lock to a video reference. A mastering house cutting Red Book masters and a facility syncing to picture could both be served by the same platform. The same survey placed the DAS-900 in the "L" tape group - a 3/4" video-based stereo processor speaking JVC's own digital interface format, distinct from the SDIF-2 and AES/EBU camps that Sony and Studer occupied. If you bought into the DAS-900, you bought into JVC's ecosystem, not the broader one.
JVC's own advertising, which ran repeatedly through 1985 and 1986, billed it as "the artist's editing system" and leaned hard on ease of use. The pitch was that anyone with a trained ear could learn to operate it in minutes and still get professional results. Recording-Engineer (February 1986, p.73) carried that same claim, and the copy made a specific point of flexibility. The 900 would run not only with 3/4" VCRs but with VHS cassettes as well, which the marketing framed as ideal for mastering digital audio discs and the then-growing hi-fi video disc market. That is a manufacturer's claim, not an independent verdict, but it shows what JVC thought the machine was for: cheap, ubiquitous videotape as the storage medium for master-quality PCM audio.
The system also turns up in the working literature, which confirms it was a real tool. A 1983 Mix facility listing for a Hollywood cutting center names JVC DAS-900 rentals, remote work, and digital editing among its services. A 1988 Mix classified advertisement offers a DAS-900 Digital Audio Processor together with related digital audio equipment and a Meridian Data CD-ROM station. A 1986 Electronic Media product update announced a full line of new peripherals for the DAS-900 mastering system, with applications spelled out as audio/video software manufacturing, compact disc mastering, CD-ROM premastering, CD-ROM cutting, and digital audio tape duplication.
For a collector today, the DAS-900 is a difficult object because it was a system. A lone processor without its editors, synchronisers, and interface boxes is a fraction of the machine. The proprietary JVC digital interface means it doesn't slot neatly into a modern signal chain the way an AES/EBU-equipped unit would. The 3/4" and VHS tape dependencies add their own maintenance burden. It was a JVC alternative to the Sony 1610/1630 orthodoxy, documented in the trade press of its day and remembered by the engineers who ran it as clean and sweet, if a little lonely.
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