New York City is famed as the proving ground for aspiring jazz musicians, but the metropolis boasts unique challenges as well as singular delights for anyone who braves its bustling thoroughfares and soaring high rises. Trombonist Michael Dease and composer Gregg Hill both served their time in the urban jungle, formative years that provide the patchwork of colors and emotions that make up Dease’s latest album of Hill’s compositions, the multi-faceted City Life.