Apple Logic Express 7 - Manual (Page 93)

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ES E
This chapter introduces Logic’s eight-voice polyphonic ES
E synthesizer.
The ES E (ES Ensemble) is designed for pad and ensemble sounds. It is great for adding
atmospheric sounds to your music.
Parameters of the ES E
4, 8, 16
The 4, 8, and 16 buttons determine the ES E’s octave transposition.
Wave
The left-most setting of the Wave parameter causes the oscillators to output sawtooth
signals, which can be modulated in frequency by the integrated LFO. Across the
remaining range, the oscillators output pulse waves, with the average pulse width
being defined by the Wave parameter.
Vib/PWM
If Wave is set to sawtooth, this parameter defines the amount of frequency modulation,
resulting in a vibrato or siren effect, depending on LFO speed and intensity. If Wave has
been set to a pulse wave, this parameter controls the amount of pulse width
modulation (PWM). When the pulse width becomes very narrow, the sound sounds like
it is being interrupted. Given this potential artefact, set the PWM intensity with care,
and select the Wave parameter’s 12 o’clock-position (50% rectangular) for the pulse
width, if you want to achieve the maximum modulation range.