7/25/2019 01 - Synthesis Lec Sir Ryan.pdf

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Synthesis

Creating tones/instrument sounds electronically from scratchpatch-instrument sound => instrument parts

Use of tone generators (oscillators) and modulators to shape sound

Oscillator 

Tone Generators that generates basic waves

Modulators

Elements: Source (Oscillators: pitch) => Filter (Cut off Frequency: Shape) => Destination(Amplifier: volume, amplitude)Modulators can be added to either of the 3 elements

To produce vibrato, add modulator to sourceTo produce tremolo, add modulator to ampTo change timber or shape of sound, add modulator to cut of frequencyVelocity is a modulator that changes the speed of the sound?

2 basic types of modulators: Envelope and LFOFilters

Low Pass - if you want to hear more of the low frequencies/boosting low freqHigh Pass - if you want to make sound brighter or brilliant/boosting high freqBand Pass - if you want to hear the mid ranges/boosting mid freq

Pass 12, 24 and 36- cuts 12, 24, or 36 dB per Octave (example 440Hz - 0 cut,880Hz - 12dB cut)

Resonance ControlVolume control of the filters

Filter SlopesEnvelope

 Attack (0-peek), Decay (the time the sound takes from the maximum to the plateaustage), Sustain, and Release (how long does the sound stay heard)Low Frequency Oscillators (LFO)

Oscillators that generates frequencies below the human hearing

Other Elements

Monophonic (for basses and other single note instruments)Polyphonic (for other polyphonic instruments)PortamentoVelocity - how hard or how soft is the attack to the instrument