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So another way you can modulate the filter and actually create a pitch modulation as well in ESP is this Vibrato Wah control. So essentially what this is, this is an LFO. What that stands for is a low frequency oscillator. So it's very much like these oscillators over here that are generating the sound that we're hearing that then we're filtering, except instead of it being an audible signal, it's sending a control signal. So it sends a periodic waveform just like these, like a triangle waveform. And instead of it outputting to the output, it's sending that signal to either this filter cutoff so that it can modulate this cutoff in a periodic way--so back and forth, and that's essentially what a wah effect is--or if I have this control and I move it over to the left, Vibrato, it's going modulate the pitch and will do it in a consistent, constant way.
So let's explore exactly what that is. In the center position, right now there's no modulation. So if I play, it's just static. (music playing) There's no vibrato. There's no wah. If I move this to the right, we're going to get a bit of filter modulation. (music playing) So you can hear the filter sweeping. It's happening pretty slow. So beneath it, I've got the speed control here. This is going to adjust the rate of the filter modulation. And then I can move this further to the right for more intensity.
So it has this wah-wah sound when I do that. (music playing) And when you are exploring that, it's a good idea to also mess around with your starting place with this cutoff. So I'll move this down a little further. (music playing) So if you want a more extreme effect, you can have your cutoff starting a little bit more closed. (music playing) It's also fun to mess around with the Resonance too. (music playing) It really can have a talkative quality to it. So that's the Wah, and we set this back in the center and there's no modulation.
So I'll open up the filter and turn down the resonance for a moment. And if we want to modulate the pitch in a constant way--so, give it vibrato-- I'm going to take this control and move it to the left. (music playing) So if I move it just a little bit, it's going to be subtle, so a just a small amount of pitch vibrato or pitch modulation. And as I bring it to the left, it's going to be a wider range of pitches. If you take all the way to the left, it's pretty extreme, big range. And then again, I can control the speed of that here with the Speed dial.
So you can have it be really slow, really fast, or anything in between. And if I don't want it to be such a range of pitches, I'll dial it back a bit. And so one sound that I think is kind of a classic thing and sort of a nostalgic vibe is you give a little bit of vibrato. So it can be pretty slow or sort of medium speed and just a small amount of vibrato and a long release. (music playing) Just because of that pitch variation, at least for me, it makes me think of vinyl or tape and how it has that inconsistency in pitch.
Another way to add more movement to the sound, and also we can add more aggression, is with the built-in chorus and overdrive, so let's check those out next.
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