01/WFD

The Korg 01/W was a workstation synthesizer, released in 1991, and was intended to replace the M1 and T series. The workstation/ROMpler was based on AI², an improved version of the AI (Advanced Integrated) Synthesis technology found in the M1. The success of the AI² architecture ensured it was used in the majority of subsequent Korg synths of the 1990s.

01/W: The basic 61 key model
01/WFD: Same as above, but with an internal floppy disk drive
01/Wpro: Same as above, but with an extra octave of keys (for a total of 76 keys) and an extra sampled Acoustic Piano sound.
01/WproX: This model had 88 weighted keys (to simulate the feel of a real acoustic piano) and also has the extra Acoustic Piano found in the 01/Wpro
01R/W: A 2U high rackmount version of the 01/WFD, with the sequencer maintained from the keyboard versions but without a floppy disk drive.
03R/W: A stripped down version of the 01R/W Rack, 1U in height, with a smaller screen, only about 90% of the samples found in its bigger brother, and no waveshaping. It was General MIDI compatible and the sequencer was removed.