I immediately thought of the first movement from Mozart's Symphony no. 40 since it's complex in scope but still Classical in the way the voices are treated meaning it's not impossible to transcribe. I've condensed all the double high wind parts into one part each. The Bassoon part is shared between Alto and Bass melodica, since it lies on the edge of both ranges. Violins I and II are doubled and the Viola parts are played divisi with 2 players. The final scoring looks like this:
Flutes I and II: Soprano melodica
Oboes I and I: Alto Melodica
Clarinets I and II: Alto melodica
Bassoons I and II: Alto and Bass Melodica
Bb Horn: Alto melodica
G Horn: Alto Melodica
Violin I: 2 Alto melodicas
VIolin II: 2 Alto melodicas
Viola: 2 Alto melodicas
Cello: Bass melodica
Bass: Bass melodica
