class LilypondNotePlayer: def __init__(self, beatsPerMinute, beatUnit, tuningSystem, note, samplingRate = 44100): self.note = note self.volume = 1 # Full colume for starters self.samplingRate = samplingRate # How many samples will I have to play? self.totalSamples = int(beatUnit * samplingRate * 60 / (note.duration * beatsPerMinute)) if self.note.times != None: self.totalSamples /= self.note.times if note.dots: self.totalSamples = int(self.totalSamples * ( 2.0 - pow(2, - note.dots))) self.wave = Wave(tuningSystem.getFrequency(note), samplingRate) self.counter = 0 self.volumeRate = None self.tied = False def getNextValue(self): self.counter+=1 # Do we have to lower the volume? if not self.tied and self.totalSamples - self.counter <= self.samplingRate * 0.05: # 5 hundredths of a second # Have to calculate a volume rate if self.totalSamples <= self.counter: self.volumeRate = 0 else: self.volumeRate = math.exp(math.log(0.01) / (self.totalSamples - self.counter)) sys.stderr.flush() if self.volumeRate != None: self.wave.setVolume(self.volume * self.volumeRate) return self.wave.getNextValue() def setTied(self, value): self.tied = value def isTied(self): return self.tied def isFinished(self): return self.counter >= self.totalSamples def setNewDuration(self, totalSamples): self.counter = 0 self.totalSamples = totalSamples def getAngle(self): return self.wave.getAngle() def setAngle(self, angle): self.wave.setAngle(angle) def getFrequency(self): return self.wave.getFrequency()
class LilypondNotePlayer: def __init__(self, beatsPerMinute, beatUnit, tuningSystem, note, samplingRate=44100): self.note = note self.volume = 1 # Full colume for starters self.samplingRate = samplingRate # How many samples will I have to play? self.totalSamples = int(beatUnit * samplingRate * 60 / (note.duration * beatsPerMinute)) if self.note.times != None: self.totalSamples /= self.note.times if note.dots: self.totalSamples = int(self.totalSamples * (2.0 - pow(2, -note.dots))) self.wave = Wave(tuningSystem.getFrequency(note), samplingRate) self.counter = 0 self.volumeRate = None self.tied = False def getNextValue(self): self.counter += 1 # Do we have to lower the volume? if not self.tied and self.totalSamples - self.counter <= self.samplingRate * 0.05: # 5 hundredths of a second # Have to calculate a volume rate if self.totalSamples <= self.counter: self.volumeRate = 0 else: self.volumeRate = math.exp( math.log(0.01) / (self.totalSamples - self.counter)) sys.stderr.flush() if self.volumeRate != None: self.wave.setVolume(self.volume * self.volumeRate) return self.wave.getNextValue() def setTied(self, value): self.tied = value def isTied(self): return self.tied def isFinished(self): return self.counter >= self.totalSamples def setNewDuration(self, totalSamples): self.counter = 0 self.totalSamples = totalSamples def getAngle(self): return self.wave.getAngle() def setAngle(self, angle): self.wave.setAngle(angle) def getFrequency(self): return self.wave.getFrequency()