![]() ![]() ![]() When such waves interact, the result is dependent on the difference in the relative positions of these crests and troughs. At a given time, not all these waves might have their crests and troughs at the same point. Now consider several such waves being generated simultaneously from a source, as is the case with real-world instruments and voices. A quick look at one single sine wave shows us that it consists of periodic high points (crests) and low points (troughs). Serum’s LFO section.īut while the amplitude and frequency of a wave are pretty self-explanatory concepts, what exactly is ‘phase’? Understanding Phase and PhasingĪs we’ve established before, all sound is comprised of waves. Modulating the amplitude creates tremolo, modulating the pitch creates vibrato, and effects like chorus, flanger, and phaser are created by phase modulation. Target or destination: What is being modulated by the LFO, such as filter cutoff or oscillator pitch.Īn LFO modulating different parameters yields different effects on the audio to be processed. Amplitude: The level or amount of modulation.Ĥ. Shape: The waveform to be used, such as sine, square, or triangle.Ģ. In a typical LFO modulator, we can set different parameters to get our desired sound.ġ. It modulates one or more parameters of the main oscillator i.e. As the name suggests, an LFO is a sound wave with a low frequency of oscillation, typically below 20 Hz and thus inaudible to the human ear. In music production and synthesis, modulation is most commonly achieved with the use of an LFO or Low Frequency Oscillator. (Source: Wikimedia Foundation) LFO Modulation The modulator itself does not produce any sound but changes the sound of the carrier signal by affecting the values of its parameters like amplitude (amplitude modulation or AM) or frequency (frequency modulation or FM), etc. It’s achieved by using a source signal or ‘modulator’ to control and vary the parameter of the input audio signal called the ‘carrier’. The process of varying one or more of these parameters to produce a change is called modulation. How we perceive a particular sound at any level is decided by a combination of parameters of these waves such as amplitude, pitch, phase relation, etc. ModulationĮverything we hear is made up of waves – or fluctuations in air pressure. #Phase shifter vs simple delay freeIn this article, I’ll explore the differences in more depth, however, before we do that - we must first dig into the building block that is common to all of them: modulation.įeel free to also check out our guide on Boost vs Overdrive vs Distortion vs Fuzz. Interference less pronounced than a flanger, the notch number depends on stagesĪs you can see, the three effects are principally quite similar to one another, with a few characteristic traits that give each one their unique sound. Pronounced interference causing comb filtering notch ![]() Minimal constructive and destructive interference Uses all-pass circuits for phase difference Original signal mixed with the delayed signal Sweeping, metallic exaggerated resonance, ‘jet plane effect’ ![]() It might be useful to tabulate their comparison for easy recall of the subtle differences as well as similarities. Instead, the signal is fed through all-pass filters to create the effect.Īll three sounds are essentially forms of phase modulation, achieved through different processes or with different parameters. Phasers, on the other hand, do not utilize delays. Flangers use shorter delay times than a chorus. The primary difference between chorus and flanger is in the delay time. But like a lot of other budding audio enthusiasts, you might be confused about how exactly they work, and how they differ from each other. You’ve no doubt heard one or more of these sounds in use in guitar rigs or mixes. They have been widely used for decades on countless hits by bands like Van Halen, The Beatles, Nirvana, and others. Learn about modulation and how it works.Ĭhorus, flanger, and phaser are three effects that are essential to any guitar pedalboard.Wondering about the differences between chorus, flanger, and phaser effects?.Disclosure: We may receive commissions when you click our links and make purchases. ![]()
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