Emmy has written for several different instrumental ensembles, including woodwind ensemble, brass quintet, string quartet, and percussion ensemble.
Links:
In the bleak midwinter (brass quintet): https://www.youtube.com/watch?v=Z6TWUPC7cys&list=PLBoG8aPq256gONw5nYeHw_87xJlmInHWK
Amazing Grace (string quartet):