ORPHEUS (On-line Retrieval from Polyhymnia: the Human-oriented Experimental Utrecht Searcher)

The objective of the Orpheus project is to approach the following three fundamental issues in music retrieval:

• Matching. Given a query theme or melody, determine if it is contained in collection of (possibly longer) melodies or complete works.

• Polyphonic matching. Given a query melody, determine is it is contained in a polyphonic piece of music.

• Indexing. Given a large collection of music, build a data structure to efficiently search for those pieces similar to the query.

You can visit the demo website.