This flexibility allows for very realistic emulations of past Korg synthesizers (both digital and analog), though stays away from trying to emulate the Korg M1 and the Korg Wavestation, (these synthesizers used Pulse-code modulation, Sample-based synthesis and Wave sequencing/vector synthesis respectively, something that MMT does not emulate).

As well as using the in-built waveforms (digital & analog emulations) for the basis of sound creation, the RADIAS allows for the input of an external signal which may be routed through the various sound shaping devices (filters / pitch envelopes etc.).

RADIAS also takes advantage of KKS Korg Komponent System which allows the user to detach the RADIAS-R module from the dedicated RADIAS-KB keyboard.

All these functions with 24-voice capability are accomplished on two TMS320VC5502 DSP chips from Texas Instruments.

In 2007, Korg released a slimmed down, three octave version of the Radias synthesizer with fewer features called the R3.