What is Oscillator Sync?

Oscillator Sync is a synthesis technique in which one oscillator (the slave) is forced to reset its waveform cycle in time with another oscillator (the master). It is known for producing harmonically rich and often aggressive timbres.

The process typically involves the master oscillator dictating the timing of the slave oscillator’s waveform restart, regardless of the slave’s frequency. When the slave oscillator is set to a higher pitch, its waveform is repeatedly cut off and restarted, creating complex harmonic shapes and distinctive tonal changes.

Oscillator Sync emphasizes harmonic intensity and movement, as adjusting the pitch of the slave oscillator changes the resulting harmonic content without altering the perceived fundamental pitch set by the master.

It is commonly used in synthesizers to create sharp, bright leads and expressive sounds, often combined with envelope or modulation to sweep the synced oscillator’s pitch for dramatic effect.

Today, Oscillator Sync is a widely used technique in electronic music and sound design, valued for its ability to generate unique, cutting tones and dynamic harmonic variation.