Purcell's 'My heart is inditing of a good matter' was specially composed for the coronation of King James II on April 23rd 1685 and was 'performed by the whole consort of voices and instruments' present in the Abbey once Mary of Modena had been crowned. As you might expect for such an occasion it's a very large-scale composition that uses four-part strings, eight-part choir and eight soloists. I like the opening Symphony with its writing for high-pitched strings and bass violins and I like how the triple section dances along as it leads us to the first chorus section. Purcell introduces this slowly the voices come in gradually building to the full eight parts. He uses antiphonal effects between the upper and lower voices at 'I speak of the things' to build up chains of suspensions before ending the section with a brief ritornello. The next section ('At his right hand …') has the pairs of voices performing dance-like dotted figurations at 'all glorious …' before changing to rich eight-part harmonies to evoke the magnificence of the queen's apparel 'Her clothing is of wrought gold'.
Part 2: She shall be brought unto the king