Korg 01R/W

Name: Korg 01R/W
Brand: Korg

The 01/W workstation in a rack. Same AI² engine, same 200 programs, 4.9 kg of metal that lives in your rack instead of on your keyboard stand.

Overview

The 01R/W is the rackmount version of Korg's 01/W workstation. It carries the same AI² (Al square) synthesis engine as the keyboard. In single mode, the tone generator gives you 32 voices and 32 oscillators. Switch to double mode and you get 16 voices driving those same 32 oscillators. Waveform memory is PCM-based at 48 Mbits, which in the early nineties meant a real sample library rather than a handful of looped tones. Two digital multi-effect systems are onboard, so you get parallel or serial processing without patching anything external.

The front panel is built around a 64 x 240 dot LCD with backlight. It's a full dot-matrix display that shows program names, parameter pages, and sequencer data. It's not the largest screen Korg ever put on a rack unit, but it's legible, and the backlight helps in a dark rack. The sequencer stores 10 songs and 100 patterns, with a maximum of 7000 notes across 16 tracks and 16 timbres, using dynamic voice allocation.

The card slots are what set the 01R/W apart from a generic rack synth. There's a PCM card slot for wave data expansion and a separate PROG/SEQ card slot for program, combination, drum kit, global parameter, and sequence data. The optional RAM card (SRC-512) lets you store your own programs and sequences. With two slots, you can load new waveforms and your own patches independently.

Around back, the outputs are more generous than most rack synths of the era: 1/L, 2/R, 3, 4, and a dedicated headphone jack. Four discrete outputs mean you can route different timbres to different mixer channels without repatching. MIDI is standard IN, OUT, and THRU. Two assignable pedal inputs handle expression or sustain control. Power consumption is rated at 11W, so heat buildup in a rack isn't a concern. Dimensions are 430mm wide, 405.3mm deep, and 89mm tall, which is a 2U rack space at standard width. Weight is 4.9 kg.

The internal architecture is built around a μPD70216L-10 CPU, with dedicated tone generator chips (the TG88 family) and a DF88 digital filter. The service manual documents a D/A offset adjustment on the KLM-1576 board. If the D/A converter or its associated parts are replaced, you need to confirm the offset voltage is 0V at the CN11A connector, adjusting with VR1 if it has drifted. The acceptable range is under 5mV, checked with an oscilloscope.

The 01R/W also has a diagnostic test mode. You can copy data between RAM cards using the built-in copy function. Insert the diagnostic test card into the PROG/SEQ DATA slot, power on while holding '3' and 'RESET' to enter test mode, then follow the on-screen prompts to copy data to a new RAM card. The manual notes that this function initializes internal data, so don't run it on a unit with patches you care about. There's also a noise and output test procedure that checks each output jack for remaining noise (specified at -77.0 dBu or lower for OUT-1 and OUT-2, -76.0 dBu for OUT-3 and OUT-4, and -78.0 dBu for the headphone outputs) and verifies signal levels are within regulation.

The 01R/W shares its lineage with the 01/W keyboard line. EQ Magazine (June 1992, p.70) described that line as having evolved from the original 01/W into "a full line of extraordinary music workstations": the 01/W with 32 voices, 200 programs, and 200 combinations, and the 01/W Pro adding more sounds and a larger keyboard. The 01R/W brings the same voice count and program/combination architecture into a rack format. Mix Magazine (April 1992, p.93) noted that Korg had become "a major force in the field of serious" synthesis with the T Series, Wavestation, and 01/W keyboard workstations.

On a used unit, value depends heavily on whether the backlight still works and whether the card slots function. The LCD is a known wear point on units this age. The RAM card option (SRC-512) is rare and often missing. The service manual's diagnostic procedures are handy for checking a used unit, since the test mode can reveal output noise issues, D/A offset drift, and card slot faults before you buy. The unit weighs 4.9 kg and takes 2U, but at 405.3mm deep it needs a deep rack case. As with any 01/W-family instrument, the AI² engine has a characteristic sound, clean and digital, capable of both realistic and synthetic timbres. It remains useful in modern setups, especially run through external effects.

The 01R/W did the same job as the keyboard version in a fraction of the space, which suited studios that already had a master keyboard.