i ... ▁was ▁the ▁first ▁full - length ▁treat ise ▁on ▁singing ▁and ▁provides ▁a ▁unique ▁g limp se ▁into ▁the ▁technical ▁and ▁social ▁aspects ▁of ▁Bar o que ▁vocal ▁music . ▁ ▁Life ▁and ▁career ▁T osi ▁was ▁born ▁in ▁Ces ena , ▁Italy ▁in ▁ 1 6 5 3 ▁or ▁ 1 6 5 4 . ▁ ▁There ▁is ▁a ▁disag re ement ▁among ▁sources ▁whether ▁he ▁was ▁the ▁son ▁of ▁composer ▁Giuseppe ▁Fel ice ▁T osi . ▁ ▁He ▁was ▁cas tr ated ▁before ▁pub ert y ▁to ▁preserve ▁his ▁high ▁voice . ▁ ▁While ▁it ▁is ▁not ▁known ▁where ▁he ▁received ▁his ▁rud iment ary ▁music ▁training , ▁he ▁sang ▁at ▁a ▁church ▁in ▁Rome ▁from ▁ 1 6 7 6 ▁to ▁ 1 6 7 7 ▁and ▁at ▁the ▁Milan ▁c athedral ▁from ▁ 1 6 8 1 ▁until ▁ 1 6 8 5 , ▁when ▁he ▁was ▁dismiss ed ▁for ▁“ mis con duct .” ▁ ▁There after , ▁he ▁made ▁his ▁one ▁recorded ▁appearance ▁in ▁opera ▁at ▁Reg gio ▁nell ’ Em ilia ▁in ▁ 1 6 8 7 ▁( in ▁Var isch ino ’ s ▁O do acre ) ▁and ▁was ▁based ▁for ▁a ▁time ▁in ▁Gen oa . ▁ ▁In ▁ 1 6 9 3 ▁T osi ▁re located ▁to ▁London ▁where ▁he ▁took ▁on ▁singing ▁students ▁and ▁sang ▁in ▁week ly ▁public ▁concert s . ▁ ▁In ▁ 1 7 0 1 ▁he ▁entered ▁into ▁the ▁service ▁of ▁Aust rian ▁Emperor ▁Joseph ▁I