#sound_reproduction__soundreproduction  the reproduction of sound
  supertype:  #reproduction.copying__replication  the act of reproducing
  subtype:  #high_fidelity__hi-fi  the reproduction of sound with little or no distortion
     subtype:  #dynamic_headroom__dynamicheadroom__headroom  the capacity of a system to reproduce loud sounds without distortion
  subtype:  #playback  the act of reproducing recorded sound; "he was allowed to hear the playback of his testimony"

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