The Reese bass sits at the heart of Drum and Bass production. That thick, detuned growl has powered dancefloors since the early 90s, and learning how to make a Reese bass for Drum and Bass in Serum will transform your tracks.
After spending countless hours tweaking oscillators and chasing that perfect wobble, I have distilled the process into a clear, repeatable method. This guide gives you exact parameter values, explains why each setting matters, and shows you how to adapt the sound for different DnB subgenres.
Table of Contents
What Is a Reese Bass?
The Reese bass takes its name from Kevin Saunderson’s track “Just Want Another Chance” released under his Reese project in 2026. The sound comes from layering two slightly detuned saw waves, which creates phasing, movement, and that unmistakable gritty texture.
When two oscillators play the same note at slightly different pitches, their waveforms interfere with each other. This produces a natural pulsating effect without needing additional modulation. Drum and Bass producers latched onto this sound because it cuts through busy drum programming while maintaining serious low-end weight.
Serum makes building this sound straightforward. You get precise control over detuning, unison, and modulation that hardware synths struggle to match. The result is a bass that works equally well for rolling Liquid lines, aggressive Neurofunk, and Jump-Up raves.
Oscillator Setup: The Foundation (2026)
Start with a clean Serum patch. Turn off all effects and modulation so you hear exactly what each oscillator contributes.
Step 1: Configure Oscillator A. Load a basic saw wave into Oscillator A. In the Wave menu, select Analog > Basic Shapes > Saw. Leave the octave at 0 and set the unison to 7 voices. This gives you width without overcrowding the spectrum.
Step 2: Configure Oscillator B. Load the same saw wave into Oscillator B. Drop the octave down by one for a fuller sound, or keep it at octave 0 for tighter bass. Set unison to 7 voices here as well. Set the level around -3dB relative to Oscillator A to create depth through layering.
Step 3: Set the Sub Oscillator. Click the Sub tab and choose a sine wave. Drop this two octaves below Oscillator A for pure sub bass. Route this to Direct Out rather than the filter path. You want this sub clean and unprocessed.
The saw waves provide harmonic content and grit. The sine wave fills out the sub frequencies that club systems need. Keeping them separate gives you better control over the final mix.
Detuning and Unison: Creating the Movement
Detuning creates the signature Reese sound. The amount you use determines the character of your bass.
For Liquid DnB: Set Oscillator A to +6 cents and Oscillator B to -6 cents. Use a detune amount of 0.02 in the Unison section. This creates slow, smooth movement perfect for rolling basslines.
For Neurofunk: Push the detune harder. Set Oscillator A to +30 cents and Oscillator B to -30 cents. Increase the unison detune to 0.08. This gives you faster modulation and a more aggressive texture.
For Jump-Up: Go extreme with ±50 cents detune and maximum unison spread. This creates a waspy, energetic sound that cuts through sparse drum arrangements.
The Blend control in Serum’s oscillator section mixes between the saw wave and a square wave. Keep this at 0% for pure saw character, or nudge it to 10-15% if you want a slightly rounder tone. Small adjustments here make noticeable differences.
LFO Modulation: Adding Dynamic Movement (2026)
Static Reese basses sound flat. Adding LFO modulation brings them to life and helps them evolve over time.
Step 1: Modulate the Filter. Click LFO 1 and set it to a sine or triangle shape. Route this to Filter 1’s Cutoff frequency. For Drum and Bass at 174bpm, set the LFO rate to 1/8 or 1/4 note depending on how fast you want the movement. A 1/4 note rate at 174bpm gives you a slow, breathing quality that works for sustained notes.
Step 2: Adjust Modulation Amount. Set the modulation depth so the cutoff moves between 200Hz and 800Hz during the LFO cycle. This creates audible movement without losing the low-end fundamentals. Use the modulation amount ring around the cutoff knob to dial this in visually.
Step 3: Add Warp Modulation. Route LFO 2 to Oscillator A’s Warp parameter. Set this to a slower rate, around 1/2 or 1/1. This adds subtle timbral shifts that keep the sound interesting over longer phrases. Keep the amount low, around 10-15%, to avoid drastic changes.
Experiment with LFO shapes. A triangle wave gives linear movement, while a sine wave eases in and out. For more experimental sounds, try the analog-style LFO shapes which introduce slight timing variations.
Sub Bass Layering: The Foundation of Power
Your main oscillators provide character and harmonics. The sub oscillator provides the weight that moves speaker cones.
Set the sub oscillator to a sine wave two octaves below your main oscillators. This places it around 40-80Hz for bass notes in the typical DnB range. Route this to Direct Out rather than through the filter. You want this signal clean and uncolored.
Adjust the sub level to taste. Start at -6dB relative to your main oscillators and increase until you feel the low-end weight in your chest. The goal is enough sub to translate on club systems without overpowering the mix.
Some producers add a second sub layer an octave higher with slight distortion. This helps the sub cut through on smaller speakers while keeping the fundamental clean. Use this technique sparingly, as too much saturation in the sub range causes muddiness.
FX Processing: Distortion, Filtering, and Polish
Serum’s built-in FX rack gives you everything needed to finalize your Reese bass. Work through the chain logically.
Step 1: Distortion. Add the Distortion module and select Tube mode. Set Drive to 25% and Mix to 50%. This adds harmonic content and helps the bass cut through busy drum arrangements. For more aggressive sounds, try Diode mode or Multiband mode with the low band emphasized.
Step 2: Filtering. Serum’s filters are excellent for shaping Reese basses. Use a Low Pass 12 or 24dB filter after distortion. Set cutoff around 800Hz-1kHz and add subtle resonance at 20%. The LFO you set earlier modulates this cutoff, creating the characteristic Reese wobble.
Step 3: Chorus and Width. Add Chorus for stereo width. Set Rate slow (0.1Hz) and Depth around 30%. This spreads the sound without causing phase issues. Follow with a subtle Phaser on a slow rate for extra movement in the midrange.
Step 4: Compression and EQ. Add Multiband Compression to control the low-end. Set the low band to compress heavily (ratio 6:1) with slow attack and fast release. This keeps the sub consistent. Follow with EQ to roll off frequencies below 30Hz and tame any harshness above 5kHz.
Portamento and Glide Settings
Portamento creates smooth transitions between notes, essential for sustained Reese basslines.
Set the Polyphony to Mono and enable Legato mode. This means Serum only retriggers the envelope when you play legato (overlapping notes). Set the Portamento time to around 30-50ms for Drum and Bass at 174bpm. Shorter times (20-30ms) work for faster basslines, while longer times (50-80ms) suit slower, sustained notes.
Use Always mode if you want portamento on every note, or Fingered mode to only apply it when you intentionally play overlapping notes. Most DnB producers prefer Fingered mode for precise control.
Tips, Variations, and Common Mistakes
Once you master the basic recipe, experiment with these variations.
Neurofunk Reese: Increase unison to 9 voices on each oscillator. Use FM from B to warp Oscillator A. Add heavy distortion and aggressive filtering. The result is a more metallic, aggressive sound typical of Neurofunk.
Liquid Reese: Keep unison lower (5 voices) and detune subtle (±6 cents). Use gentler distortion and a slower LFO rate. Add reverb in the FX chain for space and atmosphere.
Adding White Noise: Add white noise from Serum’s Noise oscillator at very low levels (-20dB or lower). Filter it with a bandpass around 2-4kHz. This adds air and grit without dominating the sound.
Avoid Phase Cancellation: Check your Reese in mono regularly. If it loses volume or sounds thin when collapsed to mono, your stereo width settings are too extreme. Reduce the unison spread or chorus depth.
Common Mistakes: Using too much detune makes the sound washy and undefined. Neglecting the sub oscillator leaves your bass thin on club systems. Over-processing with distortion destroys the low-end punch. Always A/B your processed and unprocessed sounds.
Frequently Asked Questions
Why do they call it Reese bass?
The name comes from Kevin Saunderson’s 2026 track Just Want Another Chance released under his Reese alias. The detuned bass sound in that track became the template for what we now call a Reese bass. Saunderson discovered the sound accidentally while experimenting with detuned oscillators on a Yamaha DX100 synthesizer.
How to make liquid Reese bass?
For liquid DnB, use subtle detuning around plus or minus 6 cents. Keep unison voices lower at 5 per oscillator. Use a slow LFO rate around 1/4 note at 174bpm. Add gentle chorus and a touch of reverb in the FX chain. Keep distortion light to maintain a smooth, flowing character.
When to use a Reese bass?
Reese basses work best in Drum and Bass, Dubstep, and other bass-heavy electronic genres. Use them for sustained basslines, fills, and breakdown sections. They add harmonic richness and movement that pure sine wave subs cannot provide. Avoid them in sparse arrangements where they might sound too busy.
Should a Reese bass be in mono?
The sub component should always be in mono below 120Hz. The upper harmonics can have stereo width. Use chorus and unison spread carefully to avoid phase cancellation. Check your mix in mono regularly to ensure the bass does not disappear when collapsed.
How to make a Reese bass in Serum 2?
Serum 2 follows the same principles as Serum 1. Load two saw wave oscillators and detune them in opposite directions. Use the updated filter models and distortion types for more character. The new modulation system allows more complex LFO routing. The core recipe remains identical: detuned saws, sub layer, LFO modulation, and FX processing.
What settings for porta time for Reese at 174bpm?
For Drum and Bass at 174bpm, set portamento time between 30 and 50 milliseconds. Shorter times around 20-30ms work for faster rolling basslines. Longer times up to 80ms suit sustained, evolving bass sounds. Use Mono Legato mode with Fingered triggering for precise control over when glide applies.
Conclusion
Learning how to make a Reese bass for Drum and Bass in Serum opens up a world of low-end possibilities. Start with two detuned saw waves, add a solid sub foundation, and shape everything with LFO modulation and FX processing.
The exact numbers matter less than understanding why they work. Small detune amounts give you smooth, liquid movement. Large detunes create aggressive, waspy textures. Your sub provides the weight that clubs demand.
Save this as a preset and use it as a starting point. Reese basses reward experimentation. Adjust the detune, try different warp modes, and layer in noise for your own signature sound. The best Drum and Bass producers all started with this fundamental recipe before developing their unique voices.