CoCalc provides the best real-time collaborative environment for Jupyter Notebooks, LaTeX documents, and SageMath, scalable from individual users to large groups and classes!

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#!/usr/bin/env ruby
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Dir.open(".").entries.grep(/.aiff$/).each do |inp|
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  out = inp.gsub(".aiff", ".wav")
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  system("sox #{inp} #{out}")
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end
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