There are 4 looper views: play, song, drum, service. Each view has INI file that configures available MIDI messages and respective commands
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play view -- play / record / overdub / clear song parts and switching between them. Loops for each song part can be seen and edited as well
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song view -- stop song instantly or at the end of loop. Save, empty, delete or load song. Scroll list of saved songs.
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drum view -- adjust volume and parameters. Assign configuration to drum e.g. style for pattern drum.
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service view -- restart looper, check for updates. Select one of four drum types.
More about this is in menu_config