BIAS (Brass wind Instrument Analyzing System) was developed to test brass instruments without the influence of the player. "High level players" are sometimes able to judge the musical quality of a trumpet, horn, trombone, etc., within a few minutes. But usually musicians get completely confused, if they have to test a sequence of several instruments. In addition, the judgment of the individual player depends on his individual embouchure, the mouthpiece used, and so on. There are some methods to assess the objective quality of a brass instrument. These methods however test the acoustic qualities under laboratory conditions.
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