ES1 includes a primary oscillator and a sub-oscillator. The primary oscillator generates a waveform that is sent to other parts of the synthesizer for processing or manipulation. The sub-oscillator generates a secondary waveform one or two octaves below that of the primary oscillator.
Wave knob: Select the waveform of the primary oscillator, which is responsible for the basic color of the tone. See ES1 oscillator waveforms.
Mix slider: Set the level relationship between the primary and sub-oscillator signals. (When the sub-oscillator is switched off, its output is completely removed from the signal path.)
Sub knob: Generate square, pulse, and white-noise waveforms with the sub-oscillator. The sub-oscillator also allows you to route a side-chain signal through the ES1 synthesizer engine. See Use the ES1 sub-oscillator.
2’, 4’, 8’, 16’, and 32’ buttons: Transpose the pitch of the oscillators up or down by octaves. The lowest setting is 32 feet and the highest is 2 feet. The use of the term feet to determine octaves comes from the measurements of organ pipe lengths. The longer and wider the pipe, the deeper the tone.
Rotate the Wave knob to a position between the square wave and pulse wave symbols.
The pulse width can also be automatically modulated in the modulation section (see Use the ES1 router). Modulating the pulse width with a slowly cycling LFO, for example, allows periodically mutating, fat bass sounds.