Illustration of a DJ booth: four players and a mixer

Professional DJ equipment diagnostics

Know your gear works before it matters

DeckDiag walks you through every button, fader, knob and output of your players, mixers and turntables, then gives you a clear result and a report you can share. Before the show, before the sale, before and after the repair.

Join the beta See what it does

Now in beta on iPhone, iPad and Mac. No account, no ads, no tracking.

One app, three jobs

Pick your mode when you start. You can switch any time.

Pre-show quick check

For DJs and sound technicians

Check a unit in a few minutes with one tap per test, and finish with a clear READY FOR THE SHOW result.

  • Check a whole booth: four players and a mixer under one event and stage
  • Branded one-page summary for the production crew
  • Firmware compared with the latest release

Service and repair

For repair technicians

Full diagnostics with a before-and-after comparison and a professional report for the customer.

  • PDF service reports with photos of faults
  • Liquid-damage inspection with photo evidence
  • Built-in parts reference: 4,700+ part numbers for 9 Pioneer DJ and AlphaTheta models

Buying and selling used gear

For anyone trading equipment

Check every control before you hand over the money. Selling? Send the buyer the saved report so they can see it all works.

  • Control-by-control results, not a guess
  • Report shows the date, the unit and who checked it

How it works

Connect the unit if it supports it, or follow the guided checklist. Nothing is ever sent to your equipment.

Connect or pick the model

Supported players connect over USB so DeckDiag can see each button press, fader move and jog turn. Every other model gets a guided manual checklist.

Work through the checks

Large prompts, one control at a time. Automatic checks confirm themselves; manual ones take a single tap.

Get the result

A clear verdict, every failed test listed, and photos, notes and part numbers attached.

Share the report

Save a branded summary image or a PDF and send it by Messages, email or AirDrop.

Works with

Guided checks for these models today. Coverage keeps growing; ask for yours.

Players

  • CDJ-2000Pioneer DJ
  • CDJ-2000NXS2Pioneer DJ
  • CDJ-3000Pioneer DJ
  • XDJ-1000MK2Pioneer DJ

Mixers

  • DJM-750MK2Pioneer DJ
  • DJM-900NXS2Pioneer DJ
  • DJM-A9Pioneer DJ
  • DJM-S11Pioneer DJ
  • DJM-S5Pioneer DJ
  • DJM-S7Pioneer DJ
  • DJM-V10Pioneer DJ
  • Xone:92 MK2Allen & Heath
  • Xone:96Allen & Heath
  • Xone:PX5Allen & Heath

Turntables

  • SL-1200GRTechnics
  • SL-1200M3DTechnics
  • SL-1200M5GTechnics
  • SL-1200MK2Technics
  • SL-1200MK5Technics
  • SL-1200MK7Technics

Private by design

DeckDiag works offline and needs no account. Your checks, reports, photos and customer details stay on your device unless you share them. It listens to your equipment and never sends it commands. Read the privacy policy.

Help shape DeckDiag

The beta is open to DJs, sound techs and repair technicians. Email us with the Apple ID you use for TestFlight and what gear you work with.

Request a beta invite