You don't really need to learn them in roundnotes either? Like yeah, I know that C major is all natural, G major is one sharp, etc but I don't really need to know that, the key signature is on the left side of the staff. I guess you need to learn to apply those sharps and flats though, of course.
> Sightsinging is easier with shapenote notation. After a while, you internalise the intervals between the shapes – you just know what a fa up to a sol feels and sounds like.
This makes a lot of sense. I never really internalized intervals with scored music (although maybe a bit with playing from chord charts); I internalized the position on the staff to the fingering for the note. If I learned to sing this way, I'd internalize position on the staff to pitch; like B flat sounds like [hmmm] or something. I guess you're saying singing by intervals is easier than singing by named notes? But you can really do both with shaped notes, so all the better. :)