From the course: Demystifying Audio Synthesis: The Basics
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Enriching with low-frequency oscillators (LFOs) - Logic Pro Tutorial
From the course: Demystifying Audio Synthesis: The Basics
Enriching with low-frequency oscillators (LFOs)
- [Instructor] As we've discovered, standard oscillators that we've used in additive synthesis produce repetitive waveforms. The ones we've been using produce waveforms in the audible frequency range, say between 20 Hertz and 20,000 Hertz. But LFOs, Low Frequency Oscillators are special oscillators that work only in the very low frequency range even frequency ranges that are too low to hear. And that's exactly all an LFO is. It's a generator of a very low frequency repetitive waveform, not meant in this case for us to hear, but rather to use to control or modulate a wide range of other synth parameters such as volume, filter cutoff, and pitch. Let's pop over to Ableton to see how this works. I'll use Ableton's analog instrument to demonstrate LFOs. And you can see the analog instrument has two LFOs, LFO one, and LFO two. So I'll engage LFO one by clicking on it and it becomes orange. I can then actually decide what the…
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