The British soprano Rosalind Plowright defines a spinto voice as one that has a tonal colour one down from its range.
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Giovanni Martinelli, Giacomo Lauri-Volpi, Georges Thill, Jussi Björling and Agim Hushi for instance, successfully sang spinto roles such as Radames or Canio with bright-toned voices that lacked any trace of baritonal colouration.