Francis Preve

Sound designer. Producer. Professor. Journalist. Author.

Filtering by Tag: modulation

Design: LFOs as Envelopes

In last week’s post, we examined a few methods for turning envelopes into LFOs on synths that support envelope looping. This time, we will invert that process and cover the possibilities lurking within LFOs that can also operate in one-shot mode.

One-shot mode is a neat LFO trick that can be found on several hardware and software-based synthesizers. The first time I encountered it in hardware was in Korg’s monophonic Monotribe ribbon sequencer. As for software, the ubiquitous Xfer Serum included it from its first releases.

Depending on the synthesizer’s implementation, one-shot LFOs can be either basic or mind-bogglingly complex. Here are a few techniques you can use on synths that support it.


Design: Envelopes as LFOs

Without modulation resources, a synthesizer is just a sophisticated organ. Modulation breathes life into a sound, adding motion to oscillators, filters, and amplifiers. Naturally, sound designers want as many options as possible for modulating synth parameters, but as is often the case with instrument design, pleasing every user equally is a daunting task: Some users want oodles of envelopes; others want LFOs galore.

What’s more, the feature set of a synth is a core component of its overall sound. While it’s fun to fantasize about softsynths and modular rigs having unlimited possibilities, the instruments that stand the test of time have a particular sound. And that sound is partially defined by the modulation tools that are available.

In this tutorial, we’ll look at a few ways to use envelopes as LFOs. Not every synth supports this level of versatility, but quite a few mainstream products—both software and hardware—do. Here are techniques for three of the most popular synths available now.