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GMN _Notes.md

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GMN _Notes

Author: Kaushal

Pyo

  • Pyo Uses its own server to manage audio operations
  • Notein class of Pyo is used to Receive midi notes, convert pitch to Hz and manage 10 voices of polyphony.
                self.note = Notein(poly=10, scale=1, first=0, last=127)
  • Notein.keyboard() is used to display a gui keyboard on screen which mimics a virtual keyboard
        self.note.keyboard()
  • Handle pitch and velocity (Notein outputs normalized amplitude (0 -> 1)).
        self.pit = self.note['pitch'] * self.transpo

S3Synth

  • S3Synth is a class that makes an audio processing based on certain defined routes

  • This handles the enveloping mechanism of this synthesiser

        self.amp = MidiAdsr(0.5 * self.note['velocity'],
                            attack=0.1,
                            decay=1,
                            sustain=.5,
                            release=2,
                            mul=.4)
  • Create Oscilattor self.scope1=Scope(Mix([-1self.osc1,-1self.osc2])) self.scope1.g Selector takes multiple inputs and interpolates between them to generate a single output. Stereo mix using Band-limited Low Frequency Oscillator with different wave shapes. Mix audio streams
        self.osc1 = Osc(table=self.t, freq=self.pit, mul=self.amp)
        self.osc2 = Osc(table=self.t2, freq=self.pit, phase=0.25, mul=self.amp)
        self.osc22 = Osc(table=self.t2,
                         freq=self.pit + np.pi / 2,
                         mul=self.amp)
                
                        self.osccos = Selector([self.osc2, self.osc22], voice=0.15)
        self.osccos.ctrl(title="Shift modulation amount")

                        self.osc3 = LFO(self.pit, sharp=0.5, type=2, mul=self.amp)
        self.osc3.ctrl(
            title=
            'Osc3 type 0=saw u 1=saw d 2=sq 3=tri 4=pulse 5=bipulse 6=s&h 7=Sine'
        )

        self.osc4 = LFO(self.pit, sharp=0.5, type=0, mul=self.amp)
        self.osc4.ctrl(
            title=
            "Osc4 type 0=saw u 1=saw d 2=sq 3=tri 4=pulse 5=bipulse 6=s&h 7=Sine"
        )

        self.extrasel = Selector(
            [self.osc3.mix(1), self.osc4.mix(1)], mul=0.05, voice=0.5)
        self.mainsel = Selector(
            [self.osc1.mix(1), self.osccos.mix(1)], mul=1, voice=0.5)
        self.mainsel.ctrl(title="Main Oscillator Volume")
        self.extrasel.ctrl(title="Extra Oscillator Volume Ctrl")

                self.mix = Mix([self.mainsel.mix(1), self.extrasel.mix(1)], voices=2)