Vocem is a musical composition for publication by Apple Music (April 2018) which explores a new concept of hyper-immersive music. Immersive sound is with us all the time as our ears receive sound from multiple sources and directions. Immersive music is experienced through multi-speaker systems such as surround sound and Dolby Atmos systems: ‘Immersion creates a new mode of perception and embodiment incorporating a history of listening and cultural memory.’ (M. Droumeva 2005). Vocem takes this forward through a combination of extreme saturation of the sound spectrum (high to low frequencies) and extreme spatialisation within a stereo field, with sounds arising from many more sources and directions than natural human listening would typically detect – a hyper-immersive experience. Ideally, Vocem should be experienced through stereo headphones, though it is also designed to recreate a hyper-immersive experience through stereo speakers (with adequate separation).