Acoustic Research Demonstration Record. Vol.1: The Sound Of Musical Instruments

Cover variation: on back there are 2 additional lines of text at bottom, above "European office". Compare to [r=13600322] which does not have this added text. Cover: Produced by Discos Ensayo Barcelona, Spain Ensayo producer: Antonio Armet Acoustic Research, Inc. 24 Thorndike Street, Cambridge, Massachusetts 02141 Label: BIEM ENY/AR-1