


Some of these are: dubstep, glitch hop, riddim, bass house, hybrid trap, future bass, among others. A song without the use of LFOs can sound lifeless and boring.Īdditionally, there are some electronic music genres based on sound design that, I think, need the use of LFOs. While adding movement through time, it can give more dynamism and life to the music. This is what the rate sounds like when making it decrease through time (here I’m modulating pitch and amplitude):Īpplying a single LFO to a sound can make such a huge difference. This can be either automating the knob in your DAW, or -in some plugins such as serum- you can use an envelope to modulate it or even another (or the same!) LFO. The rate of an LFO can also be modulated.

These two methods of synthesis are characterized by basically using LFOs but at a really high rate above 20 Hz. If this frequency is higher than that, you will be entering new grounds such as FM or Frequency Modulation (in terms of pitch modulation), or Ring Modulation (in terms of amplitude). Of course, most of the time you will choose rate frequencies of under 20 Hz. To give you some examples Serum’s rate can be set between 0 Hz and 100 Hz Ableton Operator’s is between 0.02 Hz and 30.9 Hz. The range of frequencies in which you can set the rate varies from synth to synth. This is particularly useful for rhythmic waveforms such as the Saw wave or the Square (as we’ll see later). For example, you can set it to repeat every 1/4 note, 1/8 note, etc. It’s usually a knob and determines the frequency of the oscillation, which, as I said earlier, is usually very low.Īlthough the rate of an LFO is measured in Hz, most synthesizers allow you to synchronize the oscillating speed with the tempo of the song. The rate, frequency or speed of an LFO determines how fast it will oscillate.
