In modern Italian how would you spell the title ?
The work was also cited in " Resonance in Singing and Speaking " by Thomas Fille - Brown ( Oliver Ditson & Co , 1911 ) , as well as the modern books " Secrets of Singing " by Jeffry Allen ( Alfred , 1994 , 2005 ) and " The Singer ’s Companion " by Brent Monahan ( Limelight Editions , 2007 ) .