module Xi::CoreExt::Numeric
Public Instance Methods
db_to_amp()
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# File lib/xi/core_ext/numeric.rb, line 7 def db_to_amp 10 ** (self / 20.0) end
degree_to_key(scale, steps_per_octave)
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# File lib/xi/core_ext/numeric.rb, line 11 def degree_to_key(scale, steps_per_octave) accidental = (self - self.to_i) * 10.0 inner_key = scale[self % scale.size] base_key = (self / scale.size).to_i * steps_per_octave + inner_key if accidental != 0 base_key + accidental * (steps_per_octave / 12.0) else base_key end end
midi_to_cps()
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# File lib/xi/core_ext/numeric.rb, line 3 def midi_to_cps 440 * (2 ** ((self - 69) / 12.0)) end