Originally Posted by
SlayForMoney
General issue with SC3900 and SDJ is that it's not possible to have correct LED feedback on the unit (off/dimmed buttons when the function is off, on when on) because Serato changed midi out range for custom midi mappings between SSL and SDJ. General consensus it that Serato done it intentionally to break support for third party controllers. There is a workaround to light all of the buttons on the unit and keep them on.
Also, SDJ gets confused by the non-ending timecode signal generated by the units (because of licencing issues it's not a 100% Serato timecode) so it's been known to randomly switch into INT mode. Common workaround is to map a keyboard button for switching back into REL mode.
Set things up in 2 stages, first only using the SC units to play a official timecode CD/file from USB to verify other things are set properly. To be completely honest, because of S9 midi buttons and controls on the mixer I see very little use of SC3900's midi buttons in hybrid midi mode. Maybe it would be best to just use them to play timecode from a file on usb, makes for easier switching in case of laptop/software issues.
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