Channa Horwitz (1932 – 2013, Los Angeles) produced drawings, paintings and installations based on a notation system called Sonakinatography – composed of the Greek words ‘sound’, ‘movement’ and ‘notation’ – invented in 1968. Based on numbers from one to eight, each associated with a colour, the Sokinatographysystem is used by the artist to organise time, space, colour, movement and sound. The two works presented here, Sonakinatography Composition #3 (1968/2004) and Sonakinatography Movement I Sheet C 2nd Variation (1969), follow precisely this system. Both are produced on graph paper, used to materialise time, with colours that in turn present movement. The artist explains: ‘I wondered if the simple language of “Sonakinatography” could speak to other artists in other disciplines in the same way that it spoke to me in painting.’ Various musical, dance, sound and light installation iterations of Sonakinatography Compositionshave been performed by composers, choreographers and artists who collaborated with her or posthumously, with her work.