
Introduction to OASYS
26
Mic/Line Inputs 1 and 2
Inputs 1 and 2 provide combined XLR and 1/4” TRS 
balanced connectors. You can use these for either 
microphone-level or line-level signals. The two inputs 
have identical sets of controls, as described below.
MIC/LINE switches
These set the input’s nominal signal level. Set these 
switches according to the type of device that you’re 
connecting, and then use the LEVEL knobs (described 
below) to optimize the gain.
Use the LINE setting (button pressed in) when 
connecting to mixers, computer audio systems, signal 
processors, or other synthesizers. The nominal level is 
+4dBu, with 12dB of headroom.
Use the MIC setting (button popped out) only when 
connecting a microphone.
LEVEL knobs
These knobs let you make more precise adjustments to 
the input level, after setting the basic levels with the 
MIC/LINE switches.
The MIN setting is unity gain; the MAX setting 
provides about 40dB of gain above unity.
PHANTOM POWER switches
These switches enable 48 volt phantom power on the 
XLR connectors only. This sends a small amount of 
power to external microphones, using the same wires 
that carry the audio signals back to the OASYS. Most 
professional condenser microphones require phantom 
power; see the microphone’s manual if you are unsure.
If you are not using a microphone which requires 
phantom power, it’s best to turn these switches to the 
OFF position.
WARNING: Never plug in unbalanced instruments 
or microphones to the XLR connectors when 
PHANTOM POWER is on.
Line Inputs 3 and 4
Inputs 3 and 4 are for line-level signals only. They use 
unbalanced 1/4” phone jacks, referenced to a +4dBu 
signal level with 12dB of headroom.
8. Analog AUDIO OUTPUTS
All of the analog audio outputs use unbalanced 1/4” 
phone jacks, referenced to a +4dBu signal level.
Connect these outputs to the input jacks of your amp 
or mixer. In addition to the L/MONO and R main 
stereo audio outputs, the OASYS provides eight 
individual audio outputs. 
The sound from each oscillator, drum, timbre/track, or 
insert effect can be freely routed to any output. 
Additionally, you can route the metronome sound to 
an individual output, to separate it from the stereo 
mix. For more information, see “Routing effect 
settings” on page 185.
(MAIN) L/MONO, R
These are the main stereo outputs; their volume is 
controlled by the VOLUME slider. All of the factory 
Programs and Combis are programmed to play 
through these outputs.
When editing sounds, or when setting up a Song in 
Sequencer mode, you can access the main outputs by 
setting Bus Select to L/R.
If no cable is connected to the R output, L/MONO will 
carry a mono summation of the stereo signal. So, if you 
are connecting to a device which does not have stereo 
inputs (such as a simple keyboard amp), use the 
L/MONO output. 
(INDIVIDUAL) 1…8
These 8 additional audio outputs let you isolate 
sounds, audio inputs, or audio tracks for recording or 
complex live sound setups. 
These can be used as stereo or mono outputs, in any 
combination. You can also use the Global Audio page 
L/R Bus Indiv. Assign parameter to map the main 
stereo outputs to any of these output pairs, if you like.
Note that the individual outputs are not affected by the 
VOLUME slider.
9. AC Power connector
Connect the included power cable here.
We recommend that you first connect the power cable 
to the OASYS, and then connect the other end of the 
cable to an AC outlet (☞p.37).