This SDK is an Android application to generate Chord Progressions, that are based on the Hooktheorys API. The Hooktheory API exposes chord probability data used in TheoryTab Searches. All requests are made over HTTPS, with request and response support for JSON and XML formats. To authenticate to the Hooktheory API, you will need to provide a bearer Token, that follows the OAuth 2 protocol. Hooktheory provides developers with support for the theory behind songs using music theory books, songwriting software, and TheoryTabs.