Produce audio data using its oscillators. The count of oscillators depends on number of input lines. They are adjusted vertically. You have on the right the option to auto-update changes you do with the controls or do it manually by the update button.

FM Synth has additional controls than Synth for its oscillators to control. The controls are related to the Low Frequency Oscillator that does the actual Frequency Modulation.

LFO wave use specific function to modulate frequency.

LFO frequency use specific frequency to modulate frequency.

LFO depth is the depth of the frequency modulation.

LFO tuning tunes by cents.