The BR-1180 does not have computer integration and cannot be connected directly to a computer. To pass audio into your computer software in real-time, you will need an audio interface to connect the left and right LINE OUTs of the BR-1180 to the inputs of an audio interface.
The Rubix 22 would be a good choice for this:
Another option would be to export your audio tracks as WAV files onto a CD. You can then place this CD into a computer and transfer the WAV file to a computer to be used in audio software and/or CD burning software. The following article will guide you through this: