@marcinzm Hi, I have a script that sets audio tracks that are by default 'Both' to 'Combine', so I assume this can be reversed..

using System;
using System.Collections.Generic;
using System.Collections;
using System.IO;
using System.Text;
using System.Windows.Forms;
using System.Globalization;
using System.Drawing;
using System.Runtime;
using System.Xml;
using ScriptPortal.Vegas;

namespace Test_Script
{
    public class Class1
    {
        public Vegas myVegas;

        public void Main(Vegas vegas)
        {
            Vegas myVegas = vegas;

            foreach(Track myTrack in myVegas.Project.Tracks)
            {
                foreach(TrackEvent evnt in myTrack.Events)
                {
                    if (evnt.Selected && evnt.IsAudio())
                    {
                        AudioEvent aevnt = (AudioEvent)evnt;

                        aevnt.Channels = ChannelRemapping.Mono;
                    }
                }
            }
        }
    }
}

public class EntryPoint
{
    public void FromVegas(Vegas vegas)
    //public void FromVegas(Vegas vegas, String scriptFile, XmlDocument scriptSettings, ScriptArgs args)
    {
        Test_Script.Class1 test = new Test_Script.Class1();
        test.Main(vegas);
    }
}