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Welcome. Today we’ll build a classic rolling Reece bassline for drum and bass in Ableton Live. This is a beginner-friendly, hands-on lesson: we’ll make a two-layer bass — a clean mono sub and a detuned Reece mid layer — program a 1–2 bar rolling MIDI phrase at 174 BPM, and glue everything together with a bus chain, sidechain, and a few mix techniques so it sits tight with your drums. Expect exact device names and settings you can copy straight into Ableton. Let’s get loud and focused.
First, a quick overview of what you’ll end up with. You’ll have:
- A sub layer: mono sine for clean low end.
- A Reece layer: detuned saw/triangle voices for gritty, moving midbass.
- A bass bus with glue compression, saturation, stereo control, and sidechain to the kick.
- A rolling MIDI phrase that breathes with a 174 BPM DnB groove.
Setup
Set your project tempo to 174 BPM. Create two MIDI tracks: name one “Bass – Sub” and the other “Bass – Reece.” You can also make them chains inside an Instrument Rack later if you prefer layering in a single track.
Making the Sub Layer
Load Operator on the Sub track and initialize the preset. On Osc A choose a sine wave and set its octave to roughly minus two. Turn off Osc B, C and D. Set the amp release around forty to one hundred milliseconds so notes don’t click. In Operator’s global voicing choose poly for now, because we’ll mono the low end later with Utility.
Place an EQ Eight after Operator. High-pass gently at about thirty hertz with a twelve dB per octave slope to remove inaudible rumble. If you want to keep the sub very pure, low-pass the sub around 120 to 180 hertz so only the true sub content remains.
Add a Utility device and set Width to zero percent to mono the sub. Adjust gain so the track peaks around minus three to zero dB, but aim for bus trim later. Optionally add a simple Compressor with a two to one ratio and light gain reduction to tame peaks. The key idea here is a tight, mono low end that won’t fight the kick.
Making the Reece Layer
Option one: use Operator. Create a new MIDI track and load Operator. Start with Osc A as a saw or a saw/triangle blend. Keep Osc A’s detune at zero. Enable Osc B and copy Osc A’s waveform. For Osc B you have two approaches: either pitch it one octave down or keep it same octave and detune by cents. A practical start is to keep the same octave and set Osc B’s fine detune to plus six to plus twelve cents. Add Osc C as a third voice detuned the opposite direction, for example minus six cents, and vary phase slightly. In Operator’s voicing set two to four voices which gives you that multi-voice detuned texture.
Add a low-pass filter, steep 24 dB if you like, and set cutoff around eight hundred to fifteen hundred hertz to keep the low mids warm and controlled. Add a little resonance, maybe zero point one to zero point three, for character. For the filter envelope use a small attack, five to twenty milliseconds, decay two hundred to four hundred milliseconds, sustain around sixty to ninety percent, and an envelope amount around thirty to fifty percent so each note has a subtle pluck.
For the amp envelope, try a tiny attack like five milliseconds, decay one hundred fifty to three hundred milliseconds, sustain around seventy to ninety percent, and release roughly fifty to one hundred fifty milliseconds. If you want subtle movement add a slow LFO, maybe between zero point one and one hertz, modulating the filter cutoff by about fifty to one hundred fifty hertz.
If you have Wavetable or Analog in Suite, you can use a two-oscillator unison with two to four voices and similar detune amounts. Wavetable’s unison spread is especially handy for rich Reece texture.
Processing the Reece
After the synth, insert EQ Eight. Low-cut the Reece at around forty hertz. Make a narrow dip between two hundred and four hundred hertz to avoid masking the sub and the kick. If you want the mids to sing, add a slight boost around eight hundred to twelve hundred hertz.
Next, add a Saturator. Drive between two and six decibels is a good range. Use Soft Sine or Analog Clip curve and pull the output down afterward to avoid clipping. For heavier grit, create a parallel distortion path: duplicate the Reece track or send it to a dedicated return labeled Distortion. On that return run heavy Saturator or Overdrive, then use EQ Eight to bandpass the distorted signal roughly three hundred to two thousand five hundred hertz. Blend this return under the dry Reece so the mids get aggressive without killing the sub.
For movement you can add Auto Filter set to bandpass or low-pass, sync an LFO at one quarter or one eighth and keep the depth subtle. Finish with Utility and set Width around fifty to eighty percent so the Reece is stereo but not overly wide, and then a gentle Compressor or Glue Compressor with two to one ratio, attack ten to thirty milliseconds, and release two hundred to three hundred milliseconds. Aim for one to four dB of gain reduction to glue the sound.
Layering and Bus Processing
Group both Sub and Reece into a Bass Bus or an Instrument Rack. On the bus insert Glue Compressor with a two to one ratio, attack around ten milliseconds, release on auto, and set make-up so the compressor gives about one to three dB of gain reduction on hits. Follow with an EQ Eight to carve the combined tone, and use a Utility at the end to keep the sub mono by design: the easy approach is to keep the sub track mono and avoid widening the low region on the Reece track.
Sidechain to the Kick
On your Bass Bus, add a Compressor configured for sidechain triggered by the kick or the drum bus. Ratio three to one, attack between one and ten milliseconds, release fifty to one hundred twenty milliseconds. Set the threshold so the bass ducks around two to six dB when the kick hits. This is essential for that DnB pocket — it lets the kick breathe and the bass move.
Programming the Rolling MIDI Pattern
Create a two-bar MIDI clip with grid set to sixteenth or thirty-second notes. Here’s a practical pattern at 174 BPM using D2 as the root. Bar one: start with a sustained D2 for half the bar, so beats one and two hold as the anchor. In the second half of bar one, add sixteenth-note stabs starting on beat three: one on three, then three more evenly spaced sixteenth hits. Bar two is more active: use an eighth plus sixteenth feel, add a short pitch stab on the offbeat and a quick sixteenth run into the next bar.
A specific example: bar one, D2 length eight sixteenths. At three one zero add one sixteenth chord stab, and continue with three more sixteenth stabs at three two, three three, three four. For bar two, put a one-eighth stab at the downbeat, follow with a one-sixteenth pitch movement into the bar end. To add expression, use small pitch bend automations of one to twelve cents on selected hits and vary velocities so stabs sit slightly lower than the long anchor notes; small velocity differences hugely improve groove.
Final Touches and Automation
Automate filter cutoff, Saturator drive, or the Distortion send macro to build tension into drops. Keep reverb very short and low-passed on a send, maybe ten to twenty percent wet and heavily low-passed, so you don’t muddy the low end. On a parallel return you can add Redux for bit reduction — try twelve to sixteen bit and a sample rate around twenty to thirty kilohertz for color, then blend lightly.
Common Mistakes to Avoid
Don’t widen the sub frequencies — keep below about 120 hertz mono. Don’t put long lush reverb on bass mids. Avoid heavy global distortion that eats the sub; instead use parallel distortion and bandpass it to the mids. If the bass and kick fight, dial sidechain. Watch release times — long releases can clash with fast breakbeats. Finally, if the sound goes hollow in mono, bounce the bus to audio and check which device introduced the stereo image.
Pro Tips for Darker, Heavier DnB
Try a frequency shifter on a parallel path with very small Hz offsets for alien overtones. Use heavy bandpassed parallel distortion for mid aggression. Use short tempo-synced Auto Filter LFOs for wobble that locks with the drums. Layer an octave up filtered and lightly saturated for presence on club systems. Automate Width on Utility so the bass narrows before the drop and opens slightly in fills for contrast.
Mini Practice Exercise — 30 to 60 Minutes
1. Set Ableton to 174 BPM. 2. Make a Sub track with Operator sine at minus two octaves and mono it. Low-pass at 120 hertz. 3. Make a Reece track with two detuned oscillators around plus and minus six to twelve cents, low-pass near one kilohertz, and add a subtle filter envelope. 4. Program a two-bar roll with a long anchor then sixteenth stabs as described. 5. Add Saturator to Reece drive four dB, send Reece to a distortion return bandpassed 400 to 2000 hertz and blend. 6. Bus both to a Bass Bus, compress lightly with two to one glue, and sidechain to the kick until the kick breathes and the bass sits tight. Challenge yourself by adding a Frequency Shifter on the distorted return and automating the mix during a build.
Homework Challenge
Build two presets: one clean and round, one gritty and aggressive. Create an eight-bar arrangement that introduces the sub first, brings in Reece, automates saturation and filter for tension, and delivers a full-drop with maxed distortion macro. Mix-check in mono and on headphones, make one EQ fix, and bounce three stems: sub, reece dry, and reece distorted. Label them clearly and, if you want, share them with me for feedback.
Recap
You built a two-layer Reece: a clean mono sub plus a detuned mid Reece with parallel bandpassed distortion, glue compression, and sidechain to the kick. Key techniques are mono sub, detune for movement, parallel distortion focused in the mids, and EQ carving between sub and Reece. Automate macros to build energy and vary the roll pattern across repetitions so the groove stays exciting.
Go make something dark and rolling. Test it on headphones and monitors, save presets as Instrument Racks, and if you want feedback send me your stems or a project note describing what you automated. I’ll give you targeted mix and arrangement advice. Let’s hear that 174 BPM energy — have fun, experiment, and trust your ears.
