Max/MSP code, documentation and technical reports (papers) for the HMM score follower reported in Jordanous (2007) MSc thesis, 2008 CIM paper and 2009 JNMR paper. The score follower uses hidden markov models to provide live automatic accompaniment (computer-generated) in live performance by a soloist, matching the soloist's tempo and expression, and following their position in the score.