XPN Builder
Download
Pad Works · Studio Instrument · V1.0

The pro expansion
builder for MPC.

XPN Builder is the pro expansion builder for Akai MPC.

macOS 13+ V1.0 · 28 Apr 2026 One-time · USD 39
midnight_drill_vol2.xpn — XPN Builder
Project
Kit 01 · 808 32
Kit 02 · Hats 16
Kit 03 · Snare 24
Kit 04 · FX 12
Kit 05 · Melody 24
Kit 06 · Drill Pack 32
Template
Chilean Drill
Pads · Bank A
A1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
Export
TARGETMPC 3.x
PADS128 / 128
KITS6
SIZE1.82 GB
BPM142
INTEGRITY✓ PASS
PACKAGING · 62%
Built for MPC 2.x Built for MPC 3.x Ableton Live export MIDI export Gumroad · BeatStars · Splice
01
Features

Everything the official builder
should have been.

9 / 9 shipping
01 · Pads

Smart Audio Classifier

Drop 400 samples into a folder. XPN analyzes each sample's frequency spectrum — detecting kicks, snares, hats, and melodics by how they sound, not by filename. Auto-builds balanced kits in seconds.

02 · Sequencer

Bake patterns into the pack

Preview groove, pocket and swing inside XPN. Export the sequence with the pack so buyers load a kit and hear your demo immediately.

03 · Templates

12 genre templates

Trap · Drill · Boom Bap · House · Afrobeat · Lo-Fi · Reggaeton · Dancehall · Jersey · 4/4 · Electronic · Hip-Hop.

BPM 70–170 · 44.1/24
04 · Export

One project. Every target.

Export the same project as an Akai MPC expansion (firmware 2.x or 3.x), a Roland SP-404 MKII import, an Ableton Live Drum Rack, an NI Maschine pack, an Elektron RYTM pack, or a Universal WAV pack — six destinations from one source. Integrity check before every bounce.

MPC 2.x
MPC 3.x
SP-404 MKII
Ableton
Maschine
Elektron
Universal
05 · Sampler edits

Trim, loop, tune — in place

A real sampler editor inside the builder: start/end, loop, tune, gain, fades, root note. No round-trips to a DAW for every fix.

06 · Batch

Multi-kit projects

16 kits × 128 pads × 4 banks in a single project. Switch in ⌘+[ ⌘+]. Batch-rename, batch-tune, batch-normalize across the whole pack.

02
Compatible hardware

One project. Every target.

Export ready-to-play packs for 6 platforms — same source, format-perfect output.

6 targets
01
Akai

MPC

Live 1 · Live 2 · Live 3 · One · One+ · X · Key · Force
.xpn expansion · firmware 2.x + 3.x

Full expansion with kits, sequences, previews and artwork — drag the .xpn into the MPC, browse it like a factory pack.

02
Roland

SP-404 MKII

SP-404 MKII
SD card ready · ROLAND/IMPORT/

WAV 16-bit / 44.1 kHz organised bank by bank. Drop the folder onto your SD card, hit Import on the device — done.

03
Ableton

Live

Live 10+ · Suite / Standard
.adg Drum Rack + samples + MIDI

Open the Drum Rack inside Live — every pad mapped, every sample loaded, patterns drop in as MIDI clips.

04
Native Instruments

Maschine

MK3 · Mikro · Plus · Studio
Sample pack + MIDI patterns

Pad-ordered folders so you can drag them into Groups in sequence. Tags file included for the NI Browser.

05
Elektron

Analog RYTM

Analog RYTM MKII
48 kHz mono WAV + MIDI · Transfer ready

Samples auto-converted to RYTM specs. PadMap.txt lists which sample lands on which pad — drag through Elektron Transfer.

06
Universal

Any DAW

Any DAW or hardware sampler
WAV folders by type + MIDI

Kicks, snares, hats, melodics — sorted by the audio classifier. Works wherever WAVs work.

How it works

From folder to finished pack
in under ten minutes.

4 steps

Drop. Assign. Tune. Ship.

XPN Builder is the only tool in the market that treats your expansion pack like a studio session — because that's what it is. Built by an indie dev in Santiago who was tired of XML surgery and Expansion Builder crashes.

  • ① Drop a folder of samples — 1 to 2,000.
  • ② Pick a genre template. Auto-assign runs.
  • ③ Edit pads, trim samples, bake a demo pattern.
  • ④ Export to every target — MPC 2, MPC 3, Ableton, MIDI.
Sampler Editor · pad A4 · kick_01.wav
IN 0.032s OUT 0.512s
START
0.032
END
0.512
LOOP
OFF
TUNE
−2 st
GAIN
+1.2 dB
ROOT
C2
03
Pricing

Pay once. Own it forever.

USD · no subscription
Early Access · First 100 Licenses
$39/ once · lifetime
Everything. No limits. No subscription.
  • Unlimited kits per project
  • Smart Audio Classifier (spectral analysis)
  • 12 genre templates + Generate Rhythms
  • Sequencer with Humanize, Probability, Euclidean
  • Filter + ADSR real-time preview
  • Sampler editor with waveform zoom
  • Mixer with pan + output bus routing
  • MPC 2.x + 3.x + Ableton + MIDI export
  • Lifetime updates
Get XPN Builder · $39

After 100 licenses: $59

Ready when you are

Ship your next pack tonight.

Download XPN Builder · macOS ↓
MACOS 13+ · 99 MB · V1.0-beta3

FREE TRIAL

Try XPN Builder free for 3 days.

No credit card. No limits. Fill in the form, get your trial key instantly.

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