Our perception of a sound depends on multiple factors. For example, at the same intensity, some frequencies sound louder than others; and, the duration of a sound influences how loud we perceive it to be. This score invites the artists to pay attention to their perception of sound – it’s loudness, timbre and duration. Each artist uses their chosen instrumentation to actualize the score independently and the recordings are then compiled according to their time-zone. The result is this 20-minute piece entitled ‘envelopes’. (by Elizabeth Millar)