What Does It Mean?

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From our dictionary:

dul•cet

(dul'sit),
adj.
1. pleasant to the ear; melodious: the dulcet tones of the cello.
2. pleasant or agreeable to the eye or the feelings; soothing.
3. Archaic.sweet to the taste or smell.

n.
an organ stop resembling the dulciana but an octave higher.