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Voice recording and playback. Using the ISD1000A Direct Analog Storage Technology integrated circuit to construct a variety of circuits capable of storing and playing 20-seconds of audio. Part 1.
POPULAR ELECTRONICS [2] Jul 1995 (v.12#7) pg. 78

Voice recording and playback. Using the ISD1000A Direct Analog Storage Technology integrated circuit to construct a variety of circuits capable of storing and playing 20-seconds of audio. Part 2. Includes a tone-controlled lock and a tone generator.
POPULAR ELECTRONICS [2] Aug 1995 (v.12#8) pg. 74

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