Density (2011) This composition focuses on density of matter and intensity of musical colors. Strings are compressed to tight clusters, cluster-lines will slowly develop towards more intensive colors. “In general, density can be changed by changing either the pressure or the temperature. Increasing the pressure will always increase the density of a material.” (Wikipedia) In musical matters, dynamics fill the function of increasing or decreasing the pressure. Shifting crescendo’s and diminuendo’s of musical texture can be compared to waves in an ocean. The musical texture shifts between more or less intensive color spectrum.
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First, the strongest moment of the concert, the world premiere of Density by Tally. Whereas in her earlier symphonic work Turbulence she orchestrated the industrial, in her new orchestral piece she shows a palpable sense of nuanced spectra. Erik Walrup, Svenska Dagbladet, March 19, 2011

Estonia-born Visby resident Mirjam Tally's 'Density' shares its title with a work by one of the leading early modernists, Edgard Varèse (whose piece for flute is called 'Density 21.5'). And there is something of Varèse's fondness for the machine-like sounds of the city in Tally's favour. The opening vapour blasts - evoked by the blowing of the brass - are the start of a machine that gradually unravels, in two great processes, both culminating in a tam-tam beat and a sudden minor harmony in the high strings. A tough and skilfully composed work, formally clear and with many exciting details. Thomas Anderberg, Dagens Nyheter, March 19, 2011