Wavetables
A wavetable is a row of stored waveforms. Space loads two of them and the Mix control crossfades from A to B. Each frame is a different balance of partials.
A wavetable is a row of stored waveforms. Each frame is a different balance of partials: the fundamental, plus the overtones that give the note its color. Moving along the row changes that balance while the note is still held.
A fixed oscillator offers one waveform and stays there. A wavetable is many of them in a line.
Space loads two tables, A and B. Mix runs from only A (−100%), through an equal blend (0%), to only B (100%). An LFO or an envelope on that mix moves the blend. Each slot has its own pitch, so a small offset between A and B thickens the note the way two detuned oscillators do. Dragging in the spectrum view emphasizes or reduces bands of partials.