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Batch operations for favourite operations
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A batch operation is an operation that is applied to all MIDI files in a MIDI folder (including all sub folders).

Operations usable for batch execution
Menu File contains item Batch conversion that displays the menu of currently available operations. When no MIDI document window is open then the menu and the toolbar displays only batch operations.

1.a dialog to fill required parameters for the operation appears and must be filled and completed with OK (this does not occur if the operation has no parameters). It is the same dialog that appears when performing the operation on a single MIDI document.  
2.a source folder must be chosen that contains the original files that should be converted. Select folder from previous operations using drop down combo box.  
3.a destination folder must be chosen (the folder must exist and should be empty), use create new folder to create a new folder (some operations don't need a destination folder when they don't generate output files e.g. Check all MIDI files). Select folder from previous operations using drop down combo box.  
4.You will be asked if the conversion should be started, continue with Yes or cancel the operation with No. You should check if the displayed path information is correct.  
5.batch execution starts after the above steps are accepted with OK or yes buttons.  
6.The batch conversion displays the operation and current source and destination file. The batch conversion can be aborted when needed.  
7.At completion of the batch conversion a text file will be displayed (with Notepad editor) with important information about certain file conversions (e.g. errors, warnings, information). You should take care about the information, and you can save or print the text file with Notepad editor.  
8.The destination folder contains the resulting files with same names at successful conversion (some operations might change file extension automatically e.g. MIDI -> Text renames to *.txt).  

Hint: The source MIDI folder must be different to the destination MIDI folder, this operation writes the resulting files into a new folder instead of overwriting your files. Never try to convert from a folder into same folder, this could destroy your MIDI files!

Hint: Choose a destination drive that has enough free disk space, else the operation might not complete successfully.

Demo limitation
the unregistered program demo (for testing only) limits the number of conversion for a batch operation. The registered program has no conversion limitation.  

Check all MIDI files
Compare all MIDI files
Rename file names to their song title
Rename track names to their MIDI filename

Compress MIDI files
Convert all ASCII text files back to MIDI
Convert all MIDI files to ASCII text
Convert all MIDI files to MIDI format 0
Convert all MIDI files to MIDI format 1
Convert all Karaoke to MIDI with lyrics

Add GM/XG/GS/GM2 initialization to all MIDI files
Fade all MIDI files
Filter MIDI commands in all MIDI files
Change volume of all MIDI files
Change midi resolution (PPQ) in all MIDI files
Copy part of all MIDI files into new files
Guess chords in all MIDI files
Map channel numbers in all MIDI files
Modify controller values in all MIDI files
Replace notes in all MIDI files
Remove chords in all MIDI files ...
Separate drum instruments in all MIDI files
Separate notes by programs in all MIDI files
Set common volume in all MIDI files
Sound setup for Pianodisc in all MIDI files
Trim mute end of song in all MIDI files