Korg 168-RC
A fully digital 16x8x2 console that put automated, component-based recording within reach of the project studio — and then quietly disappeared from the catalog.
Overview
The 168RC is the piece that anchors Korg's SoundLink Digital Recording Systems line, and the pitch was straightforward: bring completely digital, fully automated, component-based recording to market at breakthrough prices. The centerpiece is a fully digital 16x8x2 console with two ADAT optical inputs, eight analog inputs on 18-bit A/D converters, two internal effects processors, and full console automation. That combination — Lightpipe I/O, onboard effects, and automation — is the whole reason this machine matters, and it's also the reason collectors still hunt for working examples.
The conversion story is worth spelling out. The eight analog inputs run through 18-bit A/D converters, and the desk carries two internal effects processors. Sound on Sound (December 1997, p.195) described it as an all-digital 8-bus desk designed with digital requirements first rather than as an afterthought, and noted that it was the first digital console at anywhere near its price to ship two fully independent 24-bit internal effects processors with 50 presets each — including a 7-band graphic and a Leslie simulation. That's a period claim, not a manufacturer boast, and it's the detail that separates the 168RC from the pack of early digital mixers that treated effects as an upsell.
Under the hood, the architecture is more interesting than the front panel suggests. The 168RC carries four DSPs: three handle the mixer section and one handles effects. The three mixer DSPs are Korg R&D's own MSP parts, which use an original I/O architecture and therefore require interface LSI — called DAAD — to talk to ordinary digital audio devices. The effects DSP is a standard MN19412, the same device used on the Trinity. That's a meaningful detail for anyone servicing one: the mixer brain is bespoke Korg silicon, and the effects engine is a known commodity.
Clocking is handled with more care than the price point would imply. The MISC MODE selector chooses between INT, Dig In A, Dig In B, and WCLK In. Internal clock comes from a 24MHz crystal in the AUSY2 block; the Dig In A and B settings extract clock from the incoming ADAT optical signal via each AUSY2; WCLK In receives word clock through a BNC connector. All clocks feed a selector (IC11) and then a top VCO (IC12) that generates 1024Fs locked to the selected source. The MSPs, DAADs, D/As, A/Ds, and S/PDIF all lock to that top clock. The effects DSP needs a separate system clock, generated by a 40MHz crystal (X3). For a project-studio desk, this is serious housekeeping — the kind of design that keeps a Lightpipe rig from drifting when several converters are in the chain.
Korg's own SoundLink literature positions the 168RC as one component in a modular system rather than a standalone box. The companion 1212 I/O PCI card with Deck II software offers 12 inputs and 12 outputs configured as two analog I/Os, an S/PDIF I/O, and an eight-channel ADAT optical I/O, and it connects to the 168RC or to the 880 A/D and 880 D/A converters. Electronic Musician noted that the 168RC should be shipping around the time of its 1996 AES coverage, and the same coverage flagged the 880 A/D ($950) and 880 D/A ($800) as the way to expand the console's analog I/O over ADAT Optical. Later coverage in Electronic Musician described the 168RC as "now-discontinued" while noting it provided 16 channels of Lightpipe I/O and stereo S/PDIF — but no TDIF or AES/EBU ports. That's the trade-off in a nutshell: Lightpipe and S/PDIF, no TDIF, no AES/EBU.
Automation is the other headline. The desk offers full console automation, and EQ (November 1996, p.78) walked through what that means in practice — level control of signals at the source, with the ability to configure outputs as required and to record dynamically into any standard MIDI sequencer, including the one in the Trinity. That Trinity tie-in matters: the 168RC was designed to slot into a Korg-centric digital rig, and the automation workflow reflects that assumption.
Service documentation reveals the maintenance reality. The 168RC has a test mode that uses the SRAM area normally reserved for user programs, so the manual warns plainly: save all data via MIDI before entering test mode, or the user data is lost. The test sequence checks MIDI loopback through the CPU and glue logic, ROM checksum, RAM verify, read-back tests on each of the three MSPs and the effects DSP, backup battery voltage, and the sampling clock devices — with the caveat that unstable power can produce false NG readings, in which case the advice is to re-enter test mode without powering off. The devices live on the KLM-1901 main PCB. This is the kind of documentation that tells a technician exactly where to look, and it's also a reminder that these desks are now old enough that battery and capacitor service is part of ownership.
Collectors should go in with clear eyes. The 168RC is a genuinely capable digital console from the era when project studios first got real automation, and its Lightpipe-centric I/O makes it a natural partner for ADAT-era rigs. But it's a discontinued digital product with bespoke Korg DSP silicon, a battery-backed SRAM that must be preserved, and no TDIF or AES/EBU connectivity — so integration with modern or TDIF-based gear requires thought. The 1212 I/O card and the 880 converters are the intended companions, and a complete SoundLink system is a more satisfying find than a lone console. Working examples turn up, but the pool is finite and the service documentation is the buyer's best friend.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.