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 TrackPlayer: """ Will play a note that's provided to it """ def __init__(self, system, samplingRate = 44100): self.system = system self.wave = None self.samplingRate = samplingRate self.samplesToMute = None def play(self, musicalNote): if musicalNote == None: self.mute() else: self.wave = Wave(self.system.getFrequency(musicalNote), self.samplingRate) self.samplesToMute = None def mute(self, samplesToMute = None): if samplesToMute == None: # mute inmediately self.volume=0 if self.wave != None: self.wave.setVolume(0) else: self.samplesToMute = samplesToMute # What is the rate for each volume decrease to apply? self.volume=1 self.decrementRate = math.exp(math.log(0.01) / samplesToMute) def getNextValue(self): if self.wave == None: return 0 if self.samplesToMute != None: self.samplesToMute -= 1 # The volume? self.volume*=self.decrementRate self.wave.setVolume(self.volume) return self.wave.getNextValue() def getFrequency(self): if self.wave == None: return None else: return self.wave.getFrequency()
class TrackPlayer: """ Will play a note that's provided to it """ def __init__(self, system, samplingRate=44100): self.system = system self.wave = None self.samplingRate = samplingRate self.samplesToMute = None def play(self, musicalNote): if musicalNote == None: self.mute() else: self.wave = Wave(self.system.getFrequency(musicalNote), self.samplingRate) self.samplesToMute = None def mute(self, samplesToMute=None): if samplesToMute == None: # mute inmediately self.volume = 0 if self.wave != None: self.wave.setVolume(0) else: self.samplesToMute = samplesToMute # What is the rate for each volume decrease to apply? self.volume = 1 self.decrementRate = math.exp(math.log(0.01) / samplesToMute) def getNextValue(self): if self.wave == None: return 0 if self.samplesToMute != None: self.samplesToMute -= 1 # The volume? self.volume *= self.decrementRate self.wave.setVolume(self.volume) return self.wave.getNextValue() def getFrequency(self): if self.wave == None: return None else: 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()