Overview

The YPDR-601 comes from the early days of recordable CD, when a blank disc cost real money and the hardware that wrote to it cost a lot more. It was a self-contained CD-R recorder - analog and digital audio inputs and outputs, encoder, decoder, display, keypad, and read/write mechanism, all in one box and driven by a microprocessor. It was a professional tool, priced like one, and its recording logic had a quirk that set it apart from nearly everything else on the market at the time.

The quirk is the TOC. A CD-R recorder writes a temporary table of contents into the disc's program memory area as it goes, then "fixes" the disc by writing the final TOC into the lead-in. After that the disc is closed to further recording and plays on any CD player. The YPDR-601 could do exactly that. It could also do something else: before any audio was committed, the user could write a TOC made up of fixed-length tracks of 10 or 30 seconds each. Program material could then run across those boundaries without a break, though the remainder of a partially-recorded track was wasted, and each new selection had to start on a fresh track. The payoff was that a partially-recorded disc could be played in a standard CD player, and new material could be added at any time afterward. The track numbers on the player's display would not match the actual program selections. The designers clearly judged that a fair price for slowly accumulating daily reference mixes or broadcast material on a disc that could be played in ordinary machines between sessions.

The alternative "after" mode was more conventional: record the audio first, then create a permanent TOC at the end. Between the two modes, the 601 covered both the impatient and the methodical.

The rear panel reads like a professional studio's wish list. It has XLR balanced analog inputs and outputs, AES/EBU and SDIF-2 digital ports, and sync in and out. The transport controls are large and lighted, which suggests the unit was expected to be run in dim control rooms and used constantly. For duplication, a single remote could slave up to seven recorder units, so the 601 could be the start of a small production line.

The pricing shows who this was for. The recorder itself listed at $16,000, with the RC601 full-function remote controller adding $4,000, so $20,000 for the complete system. A contemporary survey of CD-R systems in Electronic Musician placed the YPDR601 at $13,980 in its self-contained systems table, alongside the Marantz Professional CDR600 at $7,500, the Studer Revox D740 at $11,500, and the Denon DN-7700R at $16,000. The $16,000 figure and the $13,980 table entry don't match, and nothing on the page reconciles them. The same survey noted that pricing on CD-R systems was changing on nearly a daily basis in this period. Either way, this was not consumer gear.

The professional press had been watching this category closely. Studio Sound (February 1992, p.10) traced the lineage back to the Yamaha/Philips YPDS-201, a collaboration that had first made one-off CD production possible at something approaching a reasonable cost - around £20,000 in the UK, roughly $36,000 at the time. The arrival of the YPDR-601 in quantity, the magazine noted, was part of a broader low-cost CD-R revolution, with the Marantz CDR-1 distributed in the UK by HHB Communications positioned essentially as a professional product. The 601 sat in that same professional tier, and the period coverage makes clear that the market was moving fast enough that prices quoted one month might not hold the next.

The 601 treats CD-R as a professional workflow tool rather than a consumer convenience. The partially-recorded disc that plays in any CD player, the seven-unit slaving for duplication, and the balanced XLR I/O are features for radio stations, studios, and post houses building reference libraries and broadcast carts, not for someone dubbing a mixtape. Anyone who finds one today should expect a heavy piece of rack equipment with a learning curve around its TOC modes. The pricing history is unsettled, because the sources don't agree.

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