MAXDJ professional DJ mixer software · Windows desktop app + MAXDJ web For version BETA 0.30.2 · 31 October 2026 Download this guide as PDF
MAXDJ DDJ-FLX10 Guide
MAXDJ plays the AlphaTheta DDJ-FLX10 out of the box: its mapping loads by itself, all four decks, the mixer, the pads in colour and the jog screens. This guide takes you from the box to the first mix, then shows what every control does in MAXDJ.
1 · Before you start
A Windows 10 or 11 computer with MAXDJ installed (see the User Guide, chapter 2), or an Android phone or tablet with the MAXDJ app (chapter 6 of this guide).
The DDJ-FLX10's Windows driver from AlphaTheta's support site (Windows only - Android needs nothing). It gives MAXDJ the console's sound card as DDJ-FLX10 ASIO.
The USB cable from the console to the computer, speakers on the console's MASTER OUT and headphones in its headphone socket.
Some music in the MAXDJ Library (User Guide, chapter 6). Tracks are analysed as they are added: BPM, beatgrid and key.
The FLX10 mixes in software: its faders, EQ knobs, crossfader and CH CUE buttons send their positions to MAXDJ, and MAXDJ's own mixer does the mixing. That is why the console's mixer section only works while MAXDJ is open and the console's sound card is chosen in MAXDJ.
2 · Connect and load the mapping
Step 1 - plug in
Install the driver first, then connect the FLX10 to the computer with the USB cable and switch it on.
On the console, set each channel's input selector to the USB port your computer is on (USB A or USB B).
Start MAXDJ.
Step 2 - the mapping loads by itself
The first time MAXDJ sees the FLX10 it loads the DDJ-FLX10 preset on its own. Nothing to do. To check, or to load it again later:
Open SETTINGS (top right) > KEYBOARD / CONSOLE > MIDI.
Preset: pick AlphaTheta DDJ-FLX10 and press LOAD PRESET.
The table below lists every mapped control. Loading the preset again replaces only the FLX10's own lines - a second console's lines stay, and your own LEARN lines for other consoles stay.
Load it again after a MAXDJ update that lists new FLX10 functions in its release notes - a table loaded before keeps the old lines.
Step 3 - check that MAXDJ hears it
Press a few pads and turn a knob: the deck on screen reacts and the pads light. If nothing happens, SETTINGS > KEYBOARD / CONSOLE > DIAGNOSTICS shows every message that arrives and what MAXDJ did with it (chapter 7).
3 · Basic settings
Five settings, once. Everything else works as it comes.
Sound: SETTINGS > AUDIO
How the sound leaves MAXDJ on the FLX10: the mix on ASIO out 1/2 (the console's MASTER OUT), the pre-listen on 3/4 (its headphones).SETTINGS > AUDIO > SOUND CARD (NATIVE ENGINE) set up for the FLX10: device DDJ-FLX10 ASIO, buffer AUTO, 44.1 kHz, every deck and the SAMPLER on ch 1/2, MONITOR on ch 3/4.
SOUND CARD (NATIVE ENGINE) (scroll down the AUDIO page): device DDJ-FLX10 ASIO (4 ch), type ASIO, buffer AUTO. AUTO uses the buffer set in the driver's own utility; if you hear crackle, raise it there.
Channel pairs: LEFT DECK, RIGHT DECK, DECK C, DECK D and SAMPLER on ch 1/2 (the console's MASTER OUT). MONITOR on ch 3/4 (the headphones).
Engine sample rate: leave 44.1 kHz.
The top bar shows NATIVE with the device and its delay when the sound runs on the console.
Four decks: SETTINGS > DISPLAY
Floating decks C & D: switch them on to play four decks. DECK 3 and DECK 4 on the console then drive MAXDJ's floating decks C and D, and the CH 3 / CH 4 strips are theirs.
With them off, DECK 3 / DECK 4 control decks A / B - the same as DECK 1 / DECK 2.
Jog mode: VINYL to scratch with the top of the platter, CDJ to pause while you hold it.
The crossfader: MIXER mode
The MIXER switch in the centre column puts MAXDJ's crossfader to work. Moving the console's crossfader switches it on by itself.
The console's CROSSFADER ASSIGN switches (A / THRU / B per channel) are only reported when they move. Flip each one once after starting MAXDJ. Until then decks A and B sit on their sides and C and D on THRU.
The headphones
CH CUE on a channel = MON on that deck in MAXDJ: you hear it in the headphones. The console's HEADPHONES LEVEL sets the volume.
The console's MASTER LEVEL sets the speakers.
4 · The console map
The DDJ-FLX10 as MAXDJ uses it. Grey = what is printed on the console, blue = what MAXDJ does with it.
The decks
DECK 1 = deck A, DECK 2 = deck B, DECK 3 = floating deck C, DECK 4 = floating deck D. The DECK 1 / DECK 3 and DECK 2 / DECK 4 buttons pick which deck a side plays, and the jog screen shows its letter.
Console
MAXDJ
With SHIFT
PLAY / PAUSE
PLAY
CUE
CUE
BEAT SYNC
SYNC (decks C / D: the floating deck's SYNC)
MASTER for this deck (A / B)
TEMPO slider
pitch (picks up: see the note below)
TEMPO RESET
pitch back to 0
pitch range (cycles)
KEY SYNC
KEY SYNC - this deck takes the other deck's key; again = off
key reset
KEY SYNC, long press
MASTER TEMPO (keylock)
Jog wheel
bend while playing; touch the top to scratch (VINYL jog mode)
ACTIVE PART DRUMS / VOCAL / INST
stem mutes: drums / vocals / bass + melody together
SLIP
SLIP mode (the track runs on under loops and scratches)
GATED CUE
QUANTIZE
QUANTIZE
SLIP REVERSE
REVERSE while held
TAILSPIN
LOOP IN · 1/2X
loop half
loop 1 beat
LOOP OUT · 2X
loop double
loop 8 beats
4 BEAT / EXIT
LOOP 4 beats
RELOOP
CUE / LOOP CALL ◀ ▶
move the loop back / forward
4 BEAT JUMP ◀ ▶
move the loop, or jump the track with no loop
MIX POINT SELECT ◀ ▶
Library up / down
MIX POINT LINK
AutoMix MIX on / off
Decks C and D have every control above. Effects pads, PAD FX and BEAT JUMP (BEAT BREAKER) work on decks A and B only.
The mixer
The channels run 3 - 1 - 2 - 4 from left to right: decks A and B in the middle, C and D outside.
Console
MAXDJ
Channel fader CH 1-4
the volume of deck A / B / C / D
EQ HI / MID / LOW
the deck's 3-band EQ: fully left = cut, centre = flat, right = +6 dB
COLOR CH 1 / CH 2
FILTER on deck A / B (centre = off; left = low-pass, right = high-pass)
CH CUE
MON: the deck in the headphones
CROSSFADER
MAXDJ's crossfader (switches MIXER mode on)
CROSSFADER ASSIGN
the deck's side: A / THRU / B
SOUND COLOR FX FILTER / SPACE / D.ECHO / CRUSH / PITCH / NOISE
effect units FILTER / REVERB / ECHO / LO-FI / RING / WAH on (both decks)
BEAT FX ON / OFF, LEVEL / DEPTH
ECHO on both decks, its wet level
CH LEVEL meters
follow MAXDJ's decks
Knobs and faders pick up. When a knob or fader sits away from the value on screen (after a start, a new track, a move with the mouse), it does nothing until it passes that value - then it takes over. No jumps in the mix.
The browser and global buttons
Console
MAXDJ
BROWSE rotary
scroll the Library track list
LOAD (left / right)
load the selected track to the deck that side has selected
BACK
the LIBRARY rack
SHIFT + BACK
the CUE-LOOP rack
VIEW
the AUTOMIX rack
Pad mode buttons
open the matching rack: HOT CUE = CUE-LOOP, PAD FX 1 = EFFECTS, BEAT JUMP = PERFORM, SAMPLER = SAMPLER; with SHIFT: KEYBOARD = LIBRARY, PAD FX 2 = AUTOMIX, BEAT LOOP = STREAM, KEY SHIFT = SETTINGS
PAGE ◀ ▶
Library page up / down (any pad mode)
SHIFT + MASTER CUE
REC: record the mix
MASTER CUE (alone)
left free, so a habit press never starts a recording
The jog screens
Each platter's screen shows MAXDJ's deck: BPM, playing speed, elapsed time, the key in Camelot, the platter marker and the cue, and the MASTER TEMPO and MASTER lamps. They work while MAXDJ is open, on the computer and on the phone.
5 · The pads
The eight pad modes and what each pad does in MAXDJ.
HOT CUE: hot cues 1-8. Press an empty pad to store a cue, press a stored one to jump; each lights in its cue colour.
PAD FX 1: MAXDJ's effect units on / off.
BEAT JUMP: BEAT BREAKER from the PERFORM rack - play once, loop, stop, roll / cut and four saved games.
SAMPLER: the eight sampler modules, lit in their colours (load samples in the SAMPLER rack).
KEYBOARD (SHIFT + HOT CUE): mute DRUMS / BASS / MELODY / VOCALS, then TAILSPIN, REVERSE, FX OFF and MON.
PAD FX 2 (SHIFT + PAD FX 1): nothing yet - the pads stay dark.
BEAT LOOP (SHIFT + BEAT JUMP): a loop of 1/8 to 16 beats.
KEY SHIFT (SHIFT + SAMPLER): key down / up a semitone, key reset.
Colours: a lit pad shows its function's colour while the function is on and white while it is off; a dark pad has nothing mapped.
Your own mapping: any control can do something else. SETTINGS > KEYBOARD / CONSOLE > MIDI: choose a Group and a Command, press LEARN + ADD, touch the control. ✕ removes a line.
6 · The FLX10 on a phone or tablet
The Android app plays the FLX10 with MAXDJ's own USB audio driver: master on the speakers, cue in the headphones, at a few milliseconds.
Connect the FLX10 to the phone or tablet's USB-C port and start MAXDJ.
Android asks to open MAXDJ for the console: tick always and allow.
The preset loads by itself, the same as on the computer. The top bar shows USB and the delay.
No audio settings: the master goes to the speakers and MON to the headphones by themselves.
The jog screens and pad colours work as on the computer. For four decks switch the floating decks on in SETTINGS > DISPLAY.
Not in the app yet: stems (ACTIVE PART and the KEYBOARD stem pads do nothing there).
7 · Troubleshooting
No sound - SETTINGS > AUDIO: is DDJ-FLX10 ASIO the device? Only one program can hold an ASIO driver: close other DJ or audio software. If the console vanished after a crash or a standby, switch it off and on.
The faders and EQ do nothing - the console mixes in software: MAXDJ must be open and the FLX10's sound card chosen. Check the channel input selectors are on USB.
The crossfader does nothing - switch MIXER on (centre column), and flip each CROSSFADER ASSIGN switch once.
DECK 3 moves deck A - the floating decks are off: SETTINGS > DISPLAY > Floating decks C & D.
A knob does nothing at first - it is picking up: turn it past the on-screen value.
Pads dark or wrong - reload the preset: SETTINGS > KEYBOARD / CONSOLE > MIDI > AlphaTheta DDJ-FLX10 > LOAD PRESET.
Still not working - SETTINGS > KEYBOARD / CONSOLE > DIAGNOSTICS: press every button and move every knob once, then SAVE REPORT and send it in. It shows what arrived and what MAXDJ did with it.
Which version am I running? - the version is next to SETTINGS at the top of the Settings window (and in the top bar on a computer or tablet).
