If it would build, this biml would generate an SSIS package with a Script task to play the intro bars to Star Wars.

Snippet.csproj

<!--
This is the relevant bit of the include that VS makes for the dll
-->

  <ItemGroup>
    <COMReference Include="WMPLib">
      <Guid>{6BF52A50-394A-11D3-B153-00C04F79FAA6}</Guid>
      <VersionMajor>1</VersionMajor>
      <VersionMinor>0</VersionMinor>
      <Lcid>0</Lcid>
      <WrapperTool>tlbimp</WrapperTool>
      <Isolated>False</Isolated>
      <EmbedInteropTypes>True</EmbedInteropTypes>
    </COMReference>
  </ItemGroup>

ThemeSong.biml

<Biml xmlns="http://schemas.varigence.com/biml.xsd">
    <ScriptProjects>
        <ScriptTaskProject ProjectCoreName="ST_PlayMidi" Name="ST_PlayMidi" VstaMajorVersion="0">
            <Files>
                <File Path="ScriptMain.cs" BuildAction="Compile">
                    <![CDATA[namespace IRule
{
    using System;
    using System.Collections.Generic;
    using System.Data;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using Microsoft.SqlServer.Dts.Runtime;
    using WMPLib;

    [Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute]
    public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
    {
        public void Main()
        {
            WindowsMediaPlayer wmp = new WindowsMediaPlayer();
            wmp.URL = @"C:\Users\BillFellows\Downloads\Movie_Themes_-_Star_Wars_-_by_John_Willams.mid";
            wmp.controls.play();
            System.Threading.Thread.Sleep(6000);

            Dts.TaskResult = (int)ScriptResults.Success;
        }

        enum ScriptResults
        {
            Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
            Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
        };
    }    
}
        ]]></File>
                <File Path="Properties\AssemblyInfo.cs" BuildAction="Compile">
using System.Reflection;
using System.Runtime.CompilerServices;

[assembly: AssemblyTitle("AssemblyTitle")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("Bill Fellows")]
[assembly: AssemblyProduct("I do bad things with SSIS")]
[assembly: AssemblyCopyright("Copyright @  2016")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
[assembly: AssemblyVersion("1.0.*")]
                </File>
            </Files>
            <AssemblyReferences>
                <AssemblyReference AssemblyPath="System" />
                <AssemblyReference AssemblyPath="System.Core" />
                <AssemblyReference AssemblyPath="System.Data" />
                <AssemblyReference AssemblyPath="System.Data.DataSetExtensions" />
                <AssemblyReference AssemblyPath="System.Windows.Forms" />
                <AssemblyReference AssemblyPath="System.Xml" />
                <AssemblyReference AssemblyPath="Microsoft.SqlServer.ManagedDTS.dll" />
                <AssemblyReference AssemblyPath="Microsoft.SqlServer.ScriptTask.dll" />
                <!-- 
                Neither of the following work :(   
                Metadata file 'c:\Windows\System32\wmp.dll' could not be opened -- 'An attempt was made to load a program with an incorrect format.
                -->
                <AssemblyReference AssemblyPath="C:\Windows\System32\wmp.dll" />
                <AssemblyReference AssemblyPath="C:\Windows\SysWOW64\wmp.dll" />
            </AssemblyReferences>
        </ScriptTaskProject>
    </ScriptProjects>

    <Packages>
        <Package Name="PleaseDoThis">
            <Tasks>
                <Script ProjectCoreName="ST_PlayMidi" Name="SCR Be Epic">
                    <ScriptTaskProjectReference ScriptTaskProjectName="ST_PlayMidi" />
                </Script>                
            </Tasks>
        </Package>
    </Packages>
</Biml>