PRESONUS AudioBox Stereo Quick Start Manual page 164

If clicking on Open Application does not immediately launch your ReWire application, this
means that the ReWire application does not support this function, so you need to manually
launch the application. The application should launch in ReWire slave mode.
Engaging "Allow tempo/signature changes" in the ReWire interface window allows the ReWire
application to make tempo and time-signature changes within Studio One. To suppress these
changes from the ReWire application, disable this option.
5.2.7 Record Enabling an Instrument Track
To record musical performance data to an Instrument Track, the track must be record-enabled. To
record-enable an Instrument Track, click on the Record Enable button once; it should turn red.
Also, note that monitor-enable is, by default, automatically engaged when Record Enable is
engaged. This behavior can be configured in the Studio One/Options/Advanced/Devices
menu. If musical data arrives from the track's selected Keyboard, the Instrument Track's meter
will move up and down, corresponding to that input.
Once an Instrument Track is record-enabled, you are ready to record musical performance
data to that track. Refer to Activating Recording for more on this topic.
5.2.8 Monitoring an Instrument Track
Instrument Tracks record and output musical-performance data, not audio. The virtual or
external instrument to which the Instrument Track is routed generates the audio. The
following describes how virtual and external instrument audio output is monitored.
5.2.9 Monitoring a Virtual Instrument
Virtual instruments usually load with a default sound; however, you should be sure that the
virtual instrument you wish to monitor is set up correctly to generate audio. With the output
of an Instrument Track routed to the virtual instrument you wish to monitor, click on the
Monitor button, and it will turn blue.
You should now be able to play the Keyboard that you selected as the input to the Instrument
Track and should see the track meter moving, as well as hear the audio output of the virtual
instrument. If you cannot hear the audio output of the virtual instrument, make sure that your
virtual instrument is set up correctly and that the corresponding audio channels in the Mix
Console are not muted.
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