PRESONUS AudioBox Stereo Quick Start Manual page 140

4.3.3 Add or Remove Software I/O Channels
Click on the Add (Mono) or Add (Stereo) button to add an Input or Output Channel,
depending on which tab you are currently viewing. When a new channel is added, the next
unassigned hardware inputs or outputs will be assigned to the new channel by default.
To remove any channel, click on the channel to select it and then click on the Remove button.
To rename any channel, double-click on the name of the channel, type a new name, and press
Enter. In order for software I/O changes to occur, be sure to click Apply before exiting this
menu.
4.3.4 Assigning Hardware I/O to Software I/O Channels
Hardware inputs and outputs are assigned to software I/O channels in a matrix router, which is
a visual representation of the routing. Software channels (mono and stereo) are each given a
horizontal row, and hardware inputs and outputs are given vertical columns. The points at
which these rows and columns intersect represent potential connections, or routes, between
the hardware I/O and software I/O channels.
By default, Studio One creates three Input Channels: one stereo and two mono. These
channels will be labeled Input L+R (stereo), Input L (mono), and Input R (mono). By default, the
stereo Input Channel will receive input from the first stereo hardware input pair of your
selected audio device. The two mono channels will receive input from the same stereo
hardware input pair.
The Output Channel is labeled Main Out (stereo) and will be routed by default to the first
stereo hardware output pair of your selected audio device.
To create a route between software I/O channels and hardware I/O, click on the empty square
at the intersection of the desired hardware input or output and the software channel input or
output. A colored square will appear with an M, L, or R label, indicating whether the route is a
mono route (M) or the left or right side of a stereo route (L or R).
While it is uncommon for Audio I/O Setup changes to be required in the middle of Song
production, the audio I/O routing can be changed at any time. However, you should be aware
that routing changes will affect all associated tracks, possibly switching inputs for audio tracks,
changing the hardware output for the Main Output, and so on.
When making new routes in the Audio I/O Setup menu, notice the meters to the left of the
software I/O channels. By displaying signal levels on each channel, these meters help you
ensure that the appropriate routings have been made.
4.3.5 Default Device I/O Setup
We recommend that you create a default Audio I/O Setup that can be a starting point for all
new Songs. This will allow you to immediately begin working in your new Song with little or
no preliminary setup.
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