ES2 LFO waveforms in Logic Pro for iPad
Choose a waveform for LFO 1 or LFO 2 from the respective Waveform pop-up menu. The table outlines how these waveforms can affect your sounds.
Tip: Try using different waveforms while a modulation routing of Pitch123 (the pitch of all three oscillators) is engaged and running
Waveform | Comments | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Triangle | Suitable for vibrato effects. | ||||||||||
Sawtooth | Suitable for helicopter and space gun sounds. Intense modulations of oscillator frequencies with a negative (inverse) sawtooth wave lead to “bubbling” sounds. Intense sawtooth modulations of lowpass filter cutoff and resonance creates rhythmic effects. The inverted sawtooth waveform provides a different start point for the modulation cycle. | ||||||||||
Rectangle | Rectangular waves periodically switch the LFO between two values. The Unipolar rectangular wave switches between a positive value and zero. The Bipolar wave switches between a positive and a negative value set to the same amount above/below zero. An interesting effect can be achieved by modulating Pitch123 with a suitable modulation intensity that leads to an interval of a fifth. Choose the upper rectangular wave to do so. | ||||||||||
Sample & Hold | The bottom two LFO waveforms output random values. A random value is selected at regular intervals, defined by the LFO rate. Sample & Hold steps between randomized values—rapid switches between values. Smoothed Sample & Hold results in fluid changes to values. The term Sample & Hold (S & H) refers to the procedure of taking samples from a noise signal at regular intervals. The values of these samples are then held until the next sample is taken. Tip: A random modulation of Pitch123 leads to an effect commonly referred to as a random pitch pattern generator or sample and hold. Try using very high notes, at very high rates and high intensities—you’ll recognize this well-known effect from hundreds of science fiction movies. |
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