Cleanup Markers (Script)

Problem

I have an annoying problem with FL studio when trying to do arrangement with my method.

In FL Studio, the piano roll typically guards against stacked time markers.

Details

Autoguard from stacked markers

However, if you use the CTRL + G method to merge patterns from the playlist window, the piano roll will not guard against stacked markers.

Details

Example merge

Pre-merge

Post merge

Pyscript solution

The following script will remove all stacked markers. Importantly, it will preserve the time signature markers!

Cleanup stacked markers

import flpianoroll as flp

dialog = """
by NEL-V
version: 0.1

Removes all stacked time signature markers from piano roll, typically caused by Alt + G on patterns. 
"""

def createDialog():
    # Find stacked time signature markers (markers at the same time position)
    time_sig_markers_by_time = {}
    
    for m in range(flp.score.markerCount):
        marker = flp.score.getMarker(m)
        
        # Check if this is a time signature marker (has tsnum and tsden properties)
        if hasattr(marker, 'tsnum') and hasattr(marker, 'tsden'):
            time = marker.time
            
            if time not in time_sig_markers_by_time:
                time_sig_markers_by_time[time] = []
            
            time_sig_markers_by_time[time].append({
                'index': m,
                'tsnum': marker.tsnum,
                'tsden': marker.tsden,
                'time': marker.time,
                'name': marker.name if hasattr(marker, 'name') else ""
            })
    
    # Count markers to be removed
    stacked_count = 0
    positions_with_stacks = 0
    
    for time, markers in time_sig_markers_by_time.items():
        if len(markers) > 1:
            stacked_count += len(markers) - 1
            positions_with_stacks += 1
    
    # Create the dialog
    title = "Time Signature Marker Cleanup"
    
    if stacked_count == 0:
        description = "No stacked time signature markers found."
    else:
        description = f"Found {stacked_count} stacked time signature markers at {positions_with_stacks} positions."
    
    form = flp.ScriptDialog(title, dialog + "\n" + description)
    
    if stacked_count > 0:
        form.AddInputCheckbox("Clean up time signature markers", False)
    
    # Store data for use in apply
    global time_sig_data
    time_sig_data = {
        'stacked_count': stacked_count,
        'markers_by_time': time_sig_markers_by_time
    }
    
    return form

def apply(form):
    global time_sig_data
    
    # Exit if "Close" was pressed or there are no stacked markers
    if time_sig_data['stacked_count'] == 0:
        return
    
    markers_by_time = time_sig_data['markers_by_time']
    
    # Create a list of indices to delete (in reverse order to avoid shifting issues)
    indices_to_delete = []
    
    for time, markers in markers_by_time.items():
        if len(markers) > 1:
            # Keep the first one, mark the rest for deletion
            for i in range(1, len(markers)):
                indices_to_delete.append(markers[i]['index'])
    
    # Sort indices in descending order to avoid shifting issues
    indices_to_delete.sort(reverse=True)
    
    # Delete the stacked markers
    for index in indices_to_delete:
        flp.score.deleteMarker(index)
    
    # Show result
    flp.Utils.ShowMessage(f"Removed {len(indices_to_delete)} stacked time signature markers.")

Details

Results

Copy the script or go to Github