@mahgister
@stuartk
@hilde45 is correct in what he says.
Even just listening to music for some people is sufficient to induce altered states of consciousness. No stimulants are needed.
This is well documented in the scientific literature. Here is just one example of a book on the subject - Herbert, R. (2011). Everyday Music Listening: Absorption, Dissociation and Trancing. Aldershot, Ashgate.
"Abstract
In what ways does listening to music shape everyday perception? Is music particularly effective in promoting shifts in consciousness? Is there any difference perceptually between contemplating one's surroundings and experiencing a work of art? Everyday Music Listening is the first book to focus in depth on the detailed nature of music listening episodes as lived mental experiences. Ruth Herbert uses new empirical data to explore the psychological processes involved in everyday music listening scenarios, charting interactions between music, perceiver and environment in a diverse range of real-world contexts. Findings are integrated with insights from a broad range of literature, including consciousness studies and research into altered states of consciousness, as well as ideas from ethology and evolutionary psychology suggesting that a psychobiological capacity for trancing is linked to the origins of making and receiving of art. The term 'trance' is not generally associated with music listening outside ethnomusicological studies of strong experiences, yet 'hypnotic-like' involvements in daily life have long been recognized by hypnotherapy researchers. The author argues that multiply distributed attention - prevalent in much contemporary listening-does not necessarily indicate superficial engagement. Music emerges as a particularly effective mediator of experience. Absorption and dissociation, as manifestations of trancing, are self-regulatory processes, often operating at the level of unconscious awareness, that support an individual perception of psychological health. This fascinating study brings together research and theory from a wide range of fields to provide a new framework for understanding the phenomenology of music listening in a way that will appeal to both specialist academic audiences and a broad general readership."
