To use individual outputs on a JV-880 you will have to sacrifice the digital effects. Output 1 is linked to delay and output 2 is linked to chorus.
To activate the individual outs use the following procedure:
- Press SYSTEM.
- Use the CURSOR buttons to select [Output mode].
- Use the DATA dial to select [4OUT].
Now that the individual output mode has been selected, use the following procedure to assign individual parts to the individual outputs:
- Press PERFORMANCE/PATCH to select PERFORMANCE mode.
- Press EDIT.
- Use the CURSOR buttons and DATA DIAL to select Part in the upper part of the display.
- Use the CURSOR buttons to select the bottom left of the display.
- Turn the DATA dial to select Output.
- Use the CURSOR buttons and DATA dial to select SB for Parts you would like to send to the individual outputs.
Note: You can also assign individual tones or rhythm instruments to the individual outputs. In step 6 of the above procedure, select PAT.
Owner's Manual: https://www.roland.com/us/support/manual_archive/