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Look up onThe Boss HR-2 Harmonist with a pink label is a vintage, Made-in-Taiwan (MIT) version of Boss's first "intelligent" pitch-shifting pedal. Released between 1994 and 1999, it is highly regarded as a cult classic for its unique, slightly grainy 90s digital texture and "imperfect" tracking that modern pedals often lack. YouTube +2Key Features and PerformanceIntelligent Harmonization: It was the first compact stompbox to offer real-time pitch detection, allowing you to select a key and scale to generate correct diatonic harmonies.Dual Voice Output: It can produce two simultaneous harmony voices with stereo outputs, enabling a wide soundstage and stacked harmonies.Tracking Characteristics: While revolutionary for its time, tracking can be poor on lower strings (especially below G on the 6th string) and with complex chords.User Requirements: Unlike automated modern units, it requires manual key selection, which may demand some music theory knowledge to avoid dissonant harmonies. YouTube +1

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