The Korg Prologue SDK is an open development API (Application Programming Interface) that allows users to extend the possibilities of the hardware synthesizer via an SDK (Software Development Kit) and dedicated development tools. For example, you'll be able to create custom digital oscillators, custom modulation effects, and much more. These can be loaded into the prologue via the prologue Librarian application (Mac and Win).
You can check out our coverage of the prologue SDK (including this video from SonicState at Superbooth18) here.
The good news is that prologue SDK is now available to download:
"[The SDK code, tools and documentation are now available on GitHub"
"[Custom oscillators and effects features will be enabled via a prologue firmware update, and the Librarian application release, in June 2018.]"
Download prologue SDK: http://www.korg.com/nz/products/synthesizers/prologue/sdk.php#download
Read our review of the Korg Prologue: https://ask.audio/articles/review-korg-prologue
Watch Korg synth video courses: https://ask.audio/academy?nleloc=category/audio/topic/korg