The quality of education is currently considered to be a concern of the highest political priority. However, quality assurances of all kinds seem to be built on and result in a number of quantitative measures. In this essay, I discuss the traditional and philosophical meaning of the concept of quality and how it is being used today, but above all how our current understanding of "quality" may influence pluralism and diversity in education and music education. The worrying trends discussed in this essay are too complex to be solved with quick efforts by philosophers, researchers, and/or teachers. Nevertheless, I illuminate some aspects of the issue which are in need of further discussion and analysis in relation to the field of music. I also indicate a number of philosophical concepts that can contribute to creating awareness of as well as evoke some resistance to this trend.