Any particular modal tuning could start on any note. Hence, aeolian could start on the traditional A, or instead could start the same set of intervals from some other base pitch. In either case, it would not follow tempered tuning pitches, having a pure fifth instead of the slightly flat one we're used to, and other, much more obvious differences. This is also why trying to modulate through a grand circle of fifths in modal tuning is a disaster :-) For any given scale, an option to specify a specific frequency for tonic, along with which mode to use - the (notes-to-pitches aeolian 'Bb) looks like the right basic idea if one can just give a frequency in place of 'Bb - with a way to produce specific frequencies for the resulting notes, should be enough. Is there any plan to deal with detailed tunings at this level?
Any particular modal tuning could start on any note. Hence, aeolian could start on the traditional A, or instead could start the same set of intervals from some other base pitch. In either case, it would not follow tempered tuning pitches, having a pure fifth instead of the slightly flat one we're used to, and other, much more obvious differences. This is also why trying to modulate through a grand circle of fifths in modal tuning is a disaster :-) For any given scale, an option to specify a specific frequency for tonic, along with which mode to use - the (notes-to-pitches aeolian 'Bb) looks like the right basic idea if one can just give a frequency in place of 'Bb - with a way to produce specific frequencies for the resulting notes, should be enough. Is there any plan to deal with detailed tunings at this level?