Official Pioneer CDJ-900 website
The latest djDecks DX beta is required to use this device.
Go to Menu->Options->MIDI
There you should see the CDJ-900 listed as "HID - Pioneer CDJ-900"
Click it and select pioneer_cdj900.xml
If you have 2 (or more) units, do the same for each. Now right-click the other units, and select a player offset for each (+1 for the second, +2 for the third, ...)
This ensures that each unit will control a different deck.
The CDJ itself should be configured in 'HID Advanced' mode. This requires firmware 3.10 or later (check the Pioneer website for more information).
To select this mode, keep the Utility (Menu) button pressed until the menu shows up.
Scroll down to 'Hid setting', click, and make sure 'Advanced' is selected instead of 'Standard'.
Go to Menu->Options->Sound.
For Output 1 and Output 2 select 'ASIO - Pioneer ASIO', and select the output channel numbers. (1/2 for the first, 3/4 for the second)
If you have more units, select the other outputs as well.
From the Pioneer CDJ ASIO utility you can also select 24-bit output and adjust the latency if required. (Select a larger buffer size if you get audio dropouts)
In 'Browse' mode, you should see the track artist and title of the currently loaded track. A number icon should also appear displaying the deck that is controlled by that unit.
Use the browse knob to browse through your tracks. The top line will show the current folder or playlist, the other lines will show the selected item in the list. Click the browse knob to load a track or open a folder. Use 'Back' to switch between files, folders and playlist. Use Tag Track to add the selected track to the current playlist.
The Info tab will show additional info about the loaded track.
Play/Pause cue will work the same as in djDecks, depending on the selected cue mode.
The search buttons can be used to seek through the song. (Beat-aligned 30 seconds forward, or 10 seconds backward)
The Rev button reverses playback until pressed again.
The Vinyl Speed Adjust knob can be used to select a slower ramp up/down speed when pressing play or pause buttons to simulate a vinyl startup/brake down sound.
The 4 auto beat loop buttons can be used to quickly start a loop. Default loop lengths are 1, 2, 4 and 8 beats, but shorter beat lengths can be selected as well.
Press the beat select button once to select the left pair of loop lengths, again to select the right pair of loop lengths.
When you press the beat select button once more, you will see the loop length buttons flashing. They are now in cue point mode. Pressing a button will instantly load the selected cue point.
By holding the beat select button pressed for one second, you will see that the buttons start flashing faster. Pressing one of them will record the current position to the selected cue point. Press the beat select button again will return to cue point mode.
From cue point mode, press the beat select button once more to return to regular auto beat loops.
Delete button pressed for a second to enter cue delete mode. In cue delete mode, presing one of the hot cue buttons will remove the cue point stored in that slot.
A loop can also be started using the Loop In button at the start of a loop, and the Loop Out button at the end of the loop. Press Reloop/Exit to exit the loop, or to return to the last used loop.
While a loop is active, hold the In button and turn the jog wheel to move the loop forwards of backward. Hold the out button and rotate the browse knob to halve or double the loop length.
The Slip button activates Synchronized Loops mode. In synchronized loops mode, when you exit a loop it will continue to play in sync with the other deck, even when you used very short loop lengths.
Use the outer ring of the jog wheel to perform a pitch-bend. Press the inner platter to scratch the sound when Vinyl mode is active. When Vinyl mode is disabled (using the 'Jog Mode' button) the inner platter will also be used for pitch-bend.
The pitch slider can work both in relative or absolute mode (see Options->Midi to select this)
The Tempo button cycles between 6, 10, 16 and 100% pitch ranges. Keep the Tempo button pressed for 1 second to reset the pitch to 0%.
Use the master tempo button to turn master tempo on or off.
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