The Bitwig host walks through the pitch controls available on any Grid oscillator, covering four tools that are easy to overlook but each serve a distinct purpose: ratio multipliers, keyboard tracking, semitone offset, and linear Hz offset.
The ratio control sets a fixed harmonic relationship between oscillators by multiplying incoming keyboard signal. A ratio of 4 places an oscillator two octaves above the base, since octaves are doublings of frequency. Fractions work too, making it straightforward to place a second oscillator below the first.
Keyboard tracking can be disabled entirely, locking an oscillator to a fixed base frequency regardless of what note is played. From there, semitone and Hz offsets let you fine-tune pitch in different ways.
The key distinction between the two offset types: semitone offsets produce beating that changes speed depending on the octave you play in, because the interval it represents is wider at higher frequencies. A linear Hz offset keeps the beating rate constant across all octaves, which makes it the more predictable choice when detuning for a steady chorus or shimmer effect.