From the course: Audio Foundations: Delay and Modulation
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LFO
From the course: Audio Foundations: Delay and Modulation
LFO
We've gotten a lot done with delay so far using the parameters of level, delay time, feedback, low-pass filtering, and polarity reversal. It's time to take it to the next level using what are known as modulation controls. Modulation is simply a secret codeword for change. We want to introduce a way for the delay time to fluctuate during the song. The delay effects we've discussed so far, echo for emphasis, echo for groove, and slap back echo, use only a static delay. Interesting new effects can be built on a changing delay time. And while we might manually change the delay time ourselves, a recorder delay time changes into the mix automation system. It is really useful to have the delay processor itself introduce the change. And this is done using a simple low-frequency oscillator or LFO. The LFO is an oscillating waveform that drives the delay time parameter. We don't listen to this signal. Instead, the delay time is controlled by it. If the LFO is a slowly moving sine wave, then the…
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Contents
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LFO2m 39s
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Get in the Mix: Modulation rate and depth7m 32s
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Get in the Mix: Modulation shape7m 43s
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Delay effects examples in various plug-ins3m 52s
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Medium delays1m 3s
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Get in the Mix: Chorus5m 54s
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Get in the Mix: Double tracking6m 23s
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Get in the Mix: Spreaders and thickeners11m 53s
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