How to Make a Reese Bass in Serum: Step-by-Step Guide for Producers

By PresetDrive | May 2026 | Sound Design Tutorials

The Reese bass is one of the most iconic sounds in bass music production. Originally crafted by Kevin Saunderson in the late 1980s, it has become the foundation for entire genres. From liquid DnB to heavy dubstep, the thick, swirling character of a good Reese is hard to replicate with any other technique.

If you have been trying to build one from scratch in Xfer Serum, you are in the right place. This tutorial walks you through the entire process, from oscillator setup to final processing. By the end, you will have a Reese bass that sits perfectly in your mix and sounds like it belongs on a professional release.

What Actually Makes a Reese Bass?

At its core, a Reese bass is built on detuned saw waves. The slight pitch difference between two or more oscillators creates that characteristic phasing and movement. It sounds alive because the waveforms are constantly shifting in and out of phase with each other.

The beauty of building your own Reese bass presets in Serum is that you get total control over how aggressive, smooth, or textured the result becomes. A DnB producer might want something rolling and warm, while a dubstep producer might push it into heavier, more distorted territory.

Step 1: Setting Up the Oscillators

Open Serum and start with an initialised patch. On Oscillator A, load a basic saw wave. This is your foundation. Set the voice count to between 2 and 4 voices using the Unison section. Keep the detune amount low for now, somewhere around 0.10 to 0.15. This creates the initial phasing without turning it into a supersaw.

Now activate Oscillator B. Load another saw wave here, but drop it down one octave. This gives you the sub weight that every Reese needs. You can also add a small amount of unison on Oscillator B (2 voices with subtle detune) to thicken the low end without making it muddy.

Fine Tuning the Detune

The real magic of a Reese sits in how much detune you apply between the two oscillators. Try shifting Oscillator B by just a few cents, somewhere between +3 and +7 cents. This micro-detuning is what creates that slow, swirling movement. Too much detune and it falls apart. Too little and it sounds static.

Step 2: Shaping with Filters

Route both oscillators into Filter 1. A low-pass filter works best for the classic Reese sound. Set the cutoff frequency around 500 to 800 Hz as a starting point, with a small amount of resonance (around 15 to 20%). This rolls off the harsh highs while preserving the midrange warmth that gives the Reese its body.

Now here is where things get interesting. Assign an LFO to the filter cutoff. Use a slow triangle or sine wave at around 0.5 to 1.5 Hz. This modulates the cutoff gently, creating that sweeping, underwater quality. The depth of this modulation determines how dramatic the sweep feels. Start with a subtle amount and increase it until the bass sounds like it is breathing.

Step 3: Adding Character with Effects

Serum's built-in effects are perfect for adding the final layer of character. Start with a Dimension Expander or Chorus effect to widen the stereo field slightly. Be careful here, as too much stereo width on a bass can cause phase issues when played on mono systems.

Next, add some light distortion. The Tube or Warm Tube distortion modes work brilliantly for Reese basses. They add harmonics without destroying the low-end weight. Keep the drive between 20 and 40% depending on how aggressive you want the sound.

Compression and EQ

A compressor after the distortion helps tame any peaks and glues the sound together. Use a moderate ratio (around 3:1 to 4:1) with a medium attack time. This lets the initial transient through while controlling the sustained body of the bass.

Finally, use a subtle EQ to carve out any problem frequencies. A gentle cut around 200 to 300 Hz can clean up any boxiness, while a small boost around 1 to 2 kHz adds definition and helps the Reese cut through a busy mix.

Step 4: Making It Sit in Your Mix

One of the biggest challenges with Reese bass sound design is getting the patch to work within a full arrangement. The swirling movement that sounds incredible in solo can quickly eat up space when drums, synths, and vocals enter the picture.

Try sidechain compressing your Reese to the kick drum. This creates rhythmic pumping that gives your drums room to breathe. In DnB production, this technique is almost mandatory for keeping the low end controlled at higher tempos.

Another approach is to use multiband processing to treat the sub frequencies (below 100 Hz) separately from the midrange character. Keep the sub clean and mono while allowing the mids to remain wide and textured.

Genre Variations

DnB Reese

For drum and bass, keep the Reese rolling and warm. Use more filter modulation and less distortion. The tempo is faster (170 to 180 BPM), so the bass needs to move quickly without becoming fatiguing. Liquid DnB producers often layer a pure sine sub underneath for extra weight.

Dubstep Reese

Dubstep calls for a more aggressive approach. Push the distortion harder, add more unison voices, and experiment with wavetable positions beyond basic saw waves. Serum's wavetable editor lets you morph between different wave shapes, which can add serious grit to your dubstep serum presets.

Bass House Reese

For bass house, think punchy and rhythmic. Gate the Reese with a sidechain or volume envelope so it hits in short, controlled bursts. Less filter movement, more drive, and a tighter low end. Bass house serum presets often use shorter decay times to keep things tight at 125 to 128 BPM.

Common Mistakes to Avoid

The most common issue producers run into is over-processing. A Reese bass should sound thick and warm, not crushed and brittle. If you are stacking multiple distortion plugins on top of Serum's built-in effects, you have probably gone too far.

Another frequent mistake is neglecting the sub layer. The Reese creates beautiful midrange movement, but it often lacks a solid fundamental below 80 Hz. Layering a clean sub sine wave underneath fills this gap and gives your track the low-end foundation it needs.

Skip the Guesswork with Ready-Made Presets

Building a Reese from scratch is a valuable exercise in sound design, and every producer should understand the fundamentals behind it. But when you are deep in a session and need inspiration fast, having a library of professionally crafted serum presets at your fingertips can make all the difference.