| Abstract | In the last years chord estimation has become important in Mu-
sic Information Retrieval (MIR). The abundance of algorithms has
driven a need for effective evaluation methods that are able to depict
correctly their accuracy. In the last six years, one of the greatest ef-
forts for this task has been done by MIREX, improving progressively
with each yearly edition. To better portray the results, MIREX makes
use of diffrent chord vocabularies for this task. For the simpler chord
vocabularies, more complex chords are mapped to simpler versions
that contain shared notes. This simpli cation makes the assumption
that the chords are very similar and can be considered as equivalent
for said vocabulary. In this work, a test is proposed in order to validate that the mappings of more complex chords to simpler chords are
perceptually relevant from a user centered perspective.
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