Instruct: Classify a given Amazon review as either positive or negative.
Query: The free form of music

Limbus 4 was an improvisational group from Germany in de late 60's who took their influence from free jazz, Jung's primal scream thory and ethnic rhythms patterns. They have created en entirely original form of music whith a high sense of freedom and universal unity through their own language, jamming with all kind of flutes such as bamboo flute, traditional recorders, plastic flutes and many others ethnic instrumentation (tablas, tamboura, cello, drums) as well as electric organ and prepared piano. The four tracks recorded here rise from the "ambient zen meditation" to the "dadaist paroxism". Here there are no chordal structure, it's just free improvisational music with some of the greats moments in the history of "kraut rock" history. Is the perfect blend between Sun Ra and the former Amon Düül. Very trippy, very tribal, very challenging music for ears that are hungry of new sensations. Highly recommended!