Equilibrium was formed by Drake Music Scotland in 2014, in response to demand from disabled musicians looking for more opportunities to write and perform music that identifies with traditional Scots music. Acoustic instruments such as the harp and fiddle alongside new digital instruments that can be played by musicians with limited mobility. The core members of the ensemble are Rhona Smith (digital harp), Clare Johnston (recorders, viola), Karen Marshalsay (harp) and Eilidh Steel (fiddle). After premiering Motion, a new piece by Fiona Rutherford at the 2014 Edinburgh International Harp Festival, Equilibrium's performances have gone from strength to strength.