Score capturing

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"Chris Jeffers (who was a musician and educator, not a computer scientist) knocked us out with OPUS, the first real-time score capturing system. Unlike most systems today it did not require metronomic playing but instead took a first pass lookng for string and weak beats (the phrasing) to establish a local model of the likely temp fluctuations and then used curve fitting and extrapolation to make judgements about just where in the measure, and for what time value, a given note had been struck." [1]