The script software/officesounds.m is the upper-level script that implements the experiment by calling the subroutine software/mrhmm_officesounds.m once for each data holdout set. The script software/mrhmm_officesounds.m essentially follows the method of software/mrhmm_test1.m with automatic labeling.
With the script as provided, a performance of about 65 errors in 12240 chances (or 0.5% error) is achieved. An unpublished paper http://class-specific.com/csf/papers/eusipco_mrhmm.pdfgoes into more detail.