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Versions: 5
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Contents
module Music
module Performance
class MidiUtil
QUARTER = Rational(1,4)
def self.delta duration, ppqn
pulses = (duration / QUARTER) * ppqn
return pulses.round
end
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
p0 = Music::Transcription::Pitch.new(octave:-1,semitone:0)
MIDI_NOTENUMS = Hash[
(0..127).map do |note_num|
[ p0.transpose(note_num), note_num ]
end
]
def self.pitch_to_notenum pitch
MIDI_NOTENUMS[pitch.round]
end
def self.dynamic_to_volume dynamic
(dynamic * 127).round
end
def self.note_velocity(accented)
accented ? 112 : 70
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems