class Music::Performance::MidiUtil
Constants
- MIDI_NOTENUMS
- QUARTER
Public Class Methods
delta(duration, ppqn)
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# File lib/music-performance/arrangement/midi/midi_util.rb, line 6 def self.delta duration, ppqn pulses = (duration / QUARTER) * ppqn return pulses.round end
dynamic_to_volume(dynamic)
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# File lib/music-performance/arrangement/midi/midi_util.rb, line 28 def self.dynamic_to_volume dynamic (dynamic * 127).round end
note_velocity(accented)
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# File lib/music-performance/arrangement/midi/midi_util.rb, line 32 def self.note_velocity(accented) accented ? 112 : 70 end
pitch_to_notenum(pitch)
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# File lib/music-performance/arrangement/midi/midi_util.rb, line 24 def self.pitch_to_notenum pitch MIDI_NOTENUMS[pitch.round] end
usec_per_qnote(notes_per_sec)
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# File lib/music-performance/arrangement/midi/midi_util.rb, line 11 def self.usec_per_qnote notes_per_sec spn = 1.0 / notes_per_sec spqn = spn / 4.0 return (spqn * 1_000_000).to_i end