Quick answer: LoopBe30 is an application used on Windows machines to establish the connection between Liquid Notes and a DAW.
LoopBe30 virtual MIDI cableLoopBe30 is a virtual MIDI device for transferring MIDI data between music applications. It is used on Windows machines only where it acts as a virtual MIDI cable offering 30 channels in total to establish the communication between Liquid Notes and any DAW.
The installer of Liquid Notes for Windows packs LoopBe30 into it. It will automatically launch the installation and setup of LoopBe30 as part of the installation process.
Should you decide not to install LoopBe30, Liquid Notes can still be operated in standalone mode but cannot connect to any DAW.