The Korg 01/W, released in 1991, represents a pivotal moment in the evolution of the digital workstation, arriving as the highly anticipated successor to the industry-defining M1. While it retained the core philosophy of its predecessor—offering a complete production studio in a single chassis—it introduced a refined sonic palette that many enthusiasts still prefer today. At the heart of its appeal is the AI² (Advanced Integrated Squared) synthesis system, which doubled the polyphony of the M1 to 32 voices and expanded the internal memory to house 254 high-quality multisampled instruments. This technical leap allowed for more complex arrangements and a richer, more detailed sound that moved away from the thinness sometimes associated with early digital gear.
Perhaps the most defining technical feature of the 01/W is its unique "Waveshaping" function. Unlike standard subtractive synthesis, waveshaping allows the user to apply a non-linear transform to a PCM sample, effectively adding new harmonics and grit before the signal ever hits the filter. This capability gives the 01/W a distinctively "warm" and "organic" character, often described as cinematic or moody, which helped it become a staple in film scoring and R&B production throughout the 1990s. This specific synthesis method was largely abandoned in Korg’s subsequent Trinity and Triton lines, making the 01/W a unique "sonic island" in the brand's history.
The hardware was designed to be a workhorse for professional musicians, featuring a 16-track sequencer and dual independent stereo multi-effects processors. These processors offered 47 different effects, allowing for professional-grade polishing of tracks entirely within the machine. Over its production run, Korg released several variations to suit different needs, including the 01/WFD which added a floppy disk drive for storage, the 76-key "pro" and 88-key "proX" versions for performers, and the 01R/W rackmount unit for studio integration. This flexibility ensured its presence in both world-class recording studios and touring rigs.
Today, the 01/W maintains a dedicated following on the used market, valued for its build quality and its specific, nostalgic timbre. While modern software can easily replicate its polyphony, many collectors argue that the physical hardware’s digital-to-analog converters and the specific math of the AI² engine provide a punch and presence that plugins lack. Maintaining these units today typically involves minor repairs, such as replacing the aging EL-backlight of the LCD screen or the internal memory battery, but for those seeking the quintessential "90s sound," the 01/W remains an essential and surprisingly affordable piece of synthesizer history.