A shamanic drumming app with a steady theta-rate drum for the journey out, the meeting and the call-back.
ContactSpirit helpers of the lower and upper worlds
The drum journey in the ethnographic record
A steady drum at four to seven beats a second carries the practitioner out along a chosen path, to the meeting, and back on the call-back rhythm.
Ways in: The drum, Binaural entrainment, The call outward. Every session is carried on binaural sound tuned toward theta, the slow rhythm of the edge of sleep that these rites were built to reach. More on the state.
Ethnographers on several continents recorded the same procedure independently: a monotonous drum, a journey, helpers, a return. The drum rate sits squarely in the theta band. It is the oldest technology of contact there is.