“Look to the opening work on the Chicago Symphony Orchestra’s recent album “Contemporary American Composers,” Jessie Montgomery’s ‘Hymn for Everyone.’ That track is plenty inviting in its regular stereo mix; even as its singable opening motif is passed between sections, taking on new timbral colors, it never loses its openhearted sense of invitation. In the Dolby Atmos mix on Apple Music, that enveloping effect deepens. The spaces among bowed strings, brasses and percussion are wider. A centrally mixed pizzicato line takes on an even more dramatic, bridging role.”