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Sometimes when we are creating FM sounds you end up losing some bass, the more modulation you have. (music playing) So as I increase the FM intensity here, the sound gets more harsh, but it's less focused on the low end. (music playing) And actually, if you take a look at this analyzer on an EQ and watch the lowest harmonic, you see as I increase the FM intensity, at certain points it decreases in its level. (music playing) And as I bring it down, you can see that it's a couple of dB louder now.
So one way that EFM1 solves that problem is by the sub-oscillator control. And what this does is it brings in a pure sine wave an octave beneath the note you are playing that's un-modulated, so it's not being FM-processed at all. (music playing) So if I turn this up, you can hear it's bringing this tone an octave lower, try to find the right balance here. (music playing) So you can get a nice full-range sound with that, which is really cool.
And then instead of having a chorus, they have a very similar thing in EMF1, Stereo Detune. It kind of takes on a chorusing quality, so it's a de-tuned signal that's mixed into dry signal that increases the stereo field, the width of the sound. So let's explore that. (music playing) And I'll just bring up FM intensity so we can hear everything a little bit more. So notice here is no Stereo Detune-- it's a very mono signal--and as soon as I engage this, all of a sudden, especially if you are listening on headphones, it's very wide.
(music playing) As I increase it, you can hear some modulation happening, and the speed of that modulation increases the further I turn this knob to the right. (music playing) So this Stereo Detune knob is a really good way to add some width to the sound. It's very cool feature. And the next thing we can do to actually fatten up the sound even more is to use the Unison control. So the Unison's up here at the top in the global settings. So when I turn that on, what is going to happen is every time I play a note on the keyboard, instead of it just allotting one voice, it's going to play two voices for that note.
(music playing) So the first thing I notice is that it makes the signal much louder, so what I want to do is turn down the amplifier level. So that's here, this main level. (music playing) So the Unison has an increased the overall volume, but because it's two independent EFM voices playing on top of each other, we also just get more variation and depth to the sound. (music playing) I'll bring in some Stereo Detune. (music playing) So now we have got a pretty thick sound. (music playing) Once you get your EFM 1 sound the way you want, sometimes it's nice to be able to add some randomization to get variations on sound, so let's explore that in the next movie.
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