You are able to add extra tracks (files) to an Ots file. The files can be CD Audio, Wave, MP3, MP2, MPEG-1, MPEG-2, etc., and even other Ots files (click here for supported media file types).
Open Ots Studio.
Click on the button and navigate to the Ots file that you would like to add the file to.
Go to File -> Import -> Ots/Wave/MPEG File(s)....
You will be prompted by the message Do you want to add to the currently open Ots file? Click on the Yes button.
Click on the Add Files button and navigate to the file you wish to add.
If you are importing Wave or non-MP3 files, make sure you have selected the correct encoder settings. Click on the Set button to adjust encoder settings.
Click on the Import button. Ots Studio will begin importing the file you have selected.
Once the import operation has completed, you will be presented with the Operation Summary dialog box that indicates the success of the operation. You can choose to view a detailed log at this point if you so desire.
Click on the Close button.
You will see the track that you have imported in the main Ots Studio window. From here, you can further edit the file if necessary. For details on editing your files click here.
Click on the button and navigate to where you want to save the file, and click on the Save button in the Save Ots file dialog box.
Tip: If you wish to move the track in the item list, simply drag and drop the track to where you want it placed.
How to remove a track from an Ots file
How to convert Wave/MP3 files to Ots files