How to Make a Foghorn Bass in Vital

To make a foghorn bass in Vital, build three layers: a high-pitched FM layer (oscillator 1 modulated by a synced, octave-up saw), a sine sub and some white noise. Add chorus, multiband compression and a filter swept by an LFO, then heavily distort all three layers together. That distortion is what turns the patch into a foghorn. Here are the exact steps from our video.

By DNB Academy · Updated 13 October 2026 · 6 min read · Vital (free synth)

Prefer to watch? The full 4-minute video builds this foghorn from an initialised patch.

1.Set up three layers: FM source, sub and noise

Start from an initialised patch and set up the oscillators:

1. Oscillator 1: load the Basic Shapes wavetable (a sine). This becomes the high FM layer.
2. Oscillator 2: turn it on and leave it as a saw wave. It will be the modulator.
3. Oscillator 3: turn it on and use it as a sub oscillator: load Basic Shapes and leave it as a sine.
4. Noise: turn on the white noise, but bring its level a bit lower.

Here's what each part will do once the patch is finished:

2.Add FM, sync and unison

Now turn oscillator 1 into a rich, high-pitched FM layer:

1. Bring the level of oscillator 2 all the way down. We only use it to modulate.
2. On oscillator 1, select FM OSC 2 in the mode menu under the phase knob (the phase-warp slot).
3. On oscillator 2, add some sync (select SYNC in its mode menu).
4. Boost the octave of oscillator 2 (pitch 12).
5. Add some unison. In the screenshot oscillator 1 runs 11 voices.

On its own this sounds bright and buzzy, not much like a foghorn yet. Keep going: the character arrives when everything hits the distortion.

3.Chorus, OTT-style compression and a filter

Go to the Effects tab and add a Chorus:

• Bring the depth a bit lower.
• Play with the delays (Delay 1 and Delay 2).
• Turn the spread down and boost the cutoff.
• Decrease the mix a little.

Next add some OTT: in Vital that's the Compressor in Multiband mode. Then add a Filter (Analog 12 dB in the screenshot).

4.Sweep the filter with LFO 1

The foghorn "movement" comes from the filter. Drag LFO 1 into the cutoff of the filter, then:

1. Bring the filter cutoff a bit lower.
2. Decrease the modulation amount a little.
3. Draw a shape in the LFO: a quick rise and a longer fall, as in the screenshot.
4. Bring the frequency down (2/1 in the screenshot) and add a bit of curve to the shape.

5.Heavily distort the three layers

At this point you might be wondering where the foghorn is. Here's the key idea: when you have a setup like this, a high-pitched FM layer with a sub and some noise, and you heavily distort all three together, you get the foghorn.

Turn on Distortion (Hard Clip in the screenshot) and push it. The sub and the FM layer intermodulate, the noise adds breath and grit, and the filter movement now shapes a thick, horn-like tone.

Tip: the same "distort a sine, a high harmonic and noise together" principle is behind our dark, minimal DnB bass in Vital. Compare the two to hear how far it can go.

6.Add reverb, shape the LFO and add pitch movement

Now it's a matter of adding some reverb and playing with the shape of your LFO until the movement feels right. The full chain in the screenshot is Chorus, Compressor (multiband), Filter, Distortion and Reverb.

Finally, add some pitch movement so the foghorn bends and slides rather than sitting on one static note. Then play it in context with drums: that's where a foghorn really comes alive.

Once you have the sound, the next challenge is writing a riff with it. Our guide to writing DnB bass patterns shows how to place calls, responses and fills in a drop.

Common mistakes

• Judging the patch before the distortion. Before the distortion it just sounds like a bright FM synth. The foghorn character only appears when all three layers are heavily distorted together.
• Noise too loud. Keep the white noise lower than the other layers. A little gives breath; too much turns into hiss.
• Hearing oscillator 2 directly. Its level should be all the way down. It's the FM modulator, not a layer.
• Too much filter modulation. Reduce the LFO amount if the sweep sounds like a wobble instead of a horn.
• Designing only in solo. Foghorns are loud and wide; check them with drums so they don't bury the kick and snare.

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FAQ

Next steps

You now have a foghorn patch you can reshape with the LFO, the distortion and the pitch. When you want to learn the whole process in order, from sound design to finished tracks, here's where to go next:

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