A compressor at the atacama large millimeter array (alma) radio telescope, at 5028 m elevation, in chile. The compressor, which is part of the cryogenic system, makes a rhythmic wheezing sound. Some voices are heard in the background. Loops at 120 bpm (loop points set in. Wav file). Alma is an astronomical interferometer of 66 radio telescopes in the atacama desert of northern chile, which observe electromagnetic radiation at millimeter and submillimeter wavelengths from the depths of space. .
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