BPM IV is the fourth release by the British electro-acoustic group Fendahl, and the first in a four part series of albums inspired by the pioneering work of Czech psychiatrist Stanislav Grof. The series explores Grof’s cartography of the deep human psyche, in which he describes four experiential patterns which emerge at the boundary of the individual and the transpersonal, typically revolving around the physical experience of the birth process - the Basic Perinatal Matrices or BPM I-IV
It is recommended to experience this recording at moderate volume in an otherwise quiet, comfortable environment, marked by the absence of bright lights or other intrusive distractions, to encourage undisturbed and focussed listening. Individuals who have chosen to experience this work in its intended Compact Cassette format are advised to ensure that the auto-reverse function on their stereo component system is selected, to allow for uninterrupted playback of the material.
Listeners may feel a rapid decompression and expansion of space, or a feeling of redemption and rebirth reflecting the termination of symbiotic union with the mother and the beginning of a new type of relationship. Pain or discomfort in specific areas of the body such as the navel or breathing difficulties might linger, but in the absence of pressure on the whole body. Mythological symbolism may present, such as the resurrection of Christ after his sacrifice on the cross, or victories over monsters involving great sacrifice. More secular symbolism might appear as the overthrow of a tyrant or the end of a long bloody war.