Award-winning star, who is bringing the concert A Life in Notes to London's Coliseum, says lyricists' words are not reaching audiences clearly, due to a lack of training and overbearing sound mixes Over a 50-year career she has sung lines written by musical theatre's biggest names but the Tony award-winning star Patti LuPone fears that lyricists are being failed by today's productions. "I cannot understand a lyric," …