My experience with Sanz and fully re-entrant tuning is that there are two voices, but not necessarily divided into melody and bass. Why can't two sopranos or tenors sing together? >>The one side is what we think we hear. The other is that if music has >> two or more voices, which is the often the case with Foscarini, >>Bartolotti, Visee etc., there is a top melody and a bass.
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