Servicio de Información Comunitario sobre Investigación y Desarrollo - CORDIS

Midi and score alignment to audio recording tool

Today, a wide range of music pieces can be found in a symbolic representation and it is available both on commercial CD's and some of it is available freely over the Internet. One example of symbolic representation is the MIDI format.

On the other hand, there are the real music recordings where the original signal is stored on a digital media (e.g. CD, DVD).

We developed a state of the art algorithm for alignment of score metadata (MIDI) to its associated real recording.

We solved several challenging problems. One problem is the tempo variability between the MIDI file and the real recording. Imagine for example the beetles 'Yesterday'. The MIDI file contains the score information and the basic tempo. One can find several real recordings of this piece. Both by the beetles and by other performers. Our algorithm can do the alignment of the score information to all of these recording.

There are wide applications for this development. For example, Query By Melody tool, where the melody is given in form of MIDI and the database contains real recordings.

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