Using the ES P Filter

The ES P includes a lowpass filter that lets you contour the output from the oscillator.

Figure. Filter parameters.
  • Frequency knob: Controls the cutoff frequency of the ES P’s lowpass filter.
  • Resonance knob: Boosts/cuts portions of the signal that surround the frequency defined by the Frequency knob.

    Note: Increasing the Resonance value results in a rejection of bass (low frequency energy) when using lowpass filters. The ES P compensates for this side-effect internally, resulting in a more bassy sound.

  • 1/3, 2/3, 3/3 (Key Follow) buttons: The cutoff frequency can be modulated by MIDI note number (keyboard position); you may know this parameter as keyboard follow on other synthesizers. Enable one of the 1/3, 2/3, 3/3 buttons to choose one-third, two-thirds, or full-keyboard follow. If no button is active, the key you strike won’t affect the cutoff frequency. This makes the lower notes sound relatively brighter than the higher ones. If 3/3 is chosen, the filter follows the pitch, resulting in a constant relationship between cutoff frequency and pitch. This is typical of many acoustic instruments where higher notes sound both brighter in tone and higher in pitch.
  • ADSR Int knob: Defines the amount (depth) of cutoff frequency modulation applied by the envelope generator (see Using the ES P Envelope and Level Controls).
  • Velo Filter knob: Sets the velocity sensitivity of the cutoff frequency modulation applied by the envelope generator. The main envelope generator (ADSR) modulates the cutoff frequency over the duration of a note. The intensity of this modulation can respond to velocity information. If you play pianissimo (velocity = 1), the modulation is minimal. If you strike with the hardest fortissimo (velocity = 127), the modulation is more intense.