Midi or LMMS native format import- export suport for BB editor for running in different different projects.

The BB editor requires beat-bassline etc export import facility , in MIDI or a new LMMS format be invented.
So that in future this files can easily be imported in a current ongoing project , without disturbing work already being made.

The issue only identifies the BB editor and a proposed MIDI or LMMS-format import/export facility; it names no files or tests. Begin by locating the BB editor and existing project import/export behavior, then clarify the format and how importing should preserve ongoing project work. Done should include an agreed format, import/export behavior, and coverage for the relevant workflows.

Written by the indexing model from the issue text.