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1. Connect the USB port on the back of the player to your Mac or device.
2. On the player, press LINK, choose CONTROL MODE, then USB MIDI, and push the rotary selector.
3. In DeckDiag open Connect → Scan USB and pick the player.

Yes. Choose Connect → Manual checklist and pick the model. DeckDiag guides you through every control and you mark each one Pass or Fail.

No. DeckDiag never sends playback, configuration or firmware commands to your equipment. By default it only listens. The optional Full Link check briefly announces DeckDiag on the link and asks players for their status, which changes nothing on the equipment.

An optional setting for booths on PRO DJ LINK. For about 10 seconds DeckDiag joins the link as an extra player, so every player reports its firmware, play state, loaded track, tempo fader and USB/SD media. It then leaves. Media summaries require the separate Read media summary setting. On iPhone/iPad, network scanning is awaiting the multicast entitlement. Turn it on in Settings → PRO DJ LINK; DeckDiag asks you to confirm before every scan. Never run it during a live set.

1. Connect your Mac (or iPhone / iPad with a USB-C Ethernet adapter) to the booth's LINK hub with an Ethernet cable.
2. Open Connect → Scan network.
3. DeckDiag lists every player and the mixer, checks the link heartbeat of each, and shows LINK OK or what to look at.

No. It compares reported firmware with its bundled reference, which may not reflect the manufacturer’s newest release. Update using the manufacturer’s official instructions.

Mark the check manually, then send us the model, the check and what you saw. Results that depend on unconfirmed knowledge are shown as WARNING rather than PASS until confirmed on real units.

Take a screenshot in the TestFlight build and choose Share Beta Feedback, or email us.

On your device unless you export, share, or enable a linked event folder. See the Privacy Policy.