From Music Hack Day
 Lyrical MaxMSP
An Ableton Live plugin built in MaxMSP (using Max for Live) that raps over your track. It can either rap the lyrics of an existing song, or search twitter and create a themed rap.
Lyrical MaxMSP is a rapping plugin instrument for Ableton Live on Mac OS X. It uses OS X's built in text-to-speech functionality. It can rap existing song lyrics or generate its own lyrics based around a theme using a twitter search.
In existing lyrics mode, the user enters the name and artist of a song, and Lyrical MaxMSP gets its lyrics using either musiXmatch or LyricFind (whichever returns the lyrics first). In original lyrics mode, Lyrical MaxMSP searches Twitter for a keyword / phrase of the users choice and creates lyrics based on recent tweets. Lyrical MaxMSP then uses the Wordnik API to split the lyrics up into syllables. The plugin features a simple 16-step sequencer which the user can use to set the rhythm that Lyrical MaxMSP will rap to.
Cycling '74 MaxMSP 5
Cycling '74 Soundflower
aka.speech~ (external MaxMSP object for speech synthesis)
Ableton Max for Live
Twitter Search API