Decks appear on the wrong mixer channels
These are general checks, not model-specific compatibility certification. Start at low volume and change one setting at a time.
Check in order
- Match each mixer input selector to the connected USB bank or LINE socket.
- In rekordbox Preferences > Audio, check device and mixer mode. For external mixing, inspect each deck output-channel assignment.
- Play A alone and note its mixer channel, then B alone. Compare physical routing with software assignments.
- Verify on headphones before low-level speaker output. USB numbering differs by model; do not assume CH2 always means USB3/4.
- If unresolved, use the support note below to record hardware, OS/app versions, last responding meter, tests and outcomes for official support.
I found a difference from a working path/track
- Change one candidate at a time; retain the working configuration and compare the same track.
Still happens / cannot compare yet
- Do not assume hardware failure or a purchase requirement. Follow the checks; record unavailable tests as unverified.
If unresolved
Record hardware models, OS/app versions, the last responding meter and test outcomes for official support. Do not infer hardware failure or a purchase requirement from unverified checks.
Official resources
Reviewed: 2026-10-18. Check model/version differences in official documentation. This does not indicate hardware testing.