In the previous section we presented a number of frameworks that aimed at offering tools for analyzing, synthesizing and processing audio signals. In this section we will introduce some frameworks that, instead of focusing on the signal, offer tools for processing music at the symbolic level. Note that we have consciously left out some interesting frameworks such as Humdrum [Huron, 1995], Melisma [Temperley, 2004] or POCO [Honing, 1990]. These frameworks focus on the analysis of symbolic music information but never address the signal level. They represent too different of a focus to actually be considered relevant to our study.