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Cassette: Dick Sutphen ACCELERATED LEARNING HP038 Cassette Tape RARE Voice Vibrato Tone
32.50 USD
39.99 USD
12 Jan 2020
25 Aug 2019
Best Offer
651
0
United States
Very Good
Sound Effects & Nature
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Dick Sutphen ACCELERATED LEARNING HP038 Cassette Tape RARE Voice Vibrato Tone With Music
Dick's voice is combined with a hearbeat and vibrato tone voices in the 4-8 cycle range, promoting a theta-level altered state.