Okay, when I wanted to make a concert mod, here's the tools I used (google them if you need to)-

1. A valid Steam copy of Left 4 Dead 2
2. L4D2 Authoring Tools installed (for VPK packer)
3. Audacity (freeware sound editing tool)

There might be better software to use other than Audacity, but I'll be describing what to do with Audacity, so if you use something else you'll have to play it by ear.

Alright, let's give this a shot!

Make the root folder first, and give it an appropriate name. For example, if it was a KISS concert mod, try naming the folder /kissconcert/ or something. You'll want to be able to find it later if needed, and you want the name to be short enough to type from memory.

Inside this root folder, create your addoninfo.txt file. Instructions on how to do this can be found in other tutorials.

Then add the rest of the folders. I figured a picture would work better than words, so create the following folder hierarchy into your root folder (ignore the files, just create the actual folders MINUS the materials folder, that's a different tutorial altogether):

The concert has four tracks it plays. Look back at the attachment above.

Midnight Ride is the first song that plays.
Midnight Tank plays during the first tank fight.
One Bad Man plays after the first tank.
One Bad Tank plays during the second tank.

You'll want a song for each one. Here's the basic process for converting these songs for use in the concert.

Open the mp3 (or whatever format it is) in Audacity. You'll probably want to just open Audacity and choose File > Import > Audio.

If you're not concerned about file sizes, skip this step. Select the whole track in Audacity (Ctrl - A works fine) and click Effect > Amplify. Use a value of 2.0 or so. If I remember correctly, this lowers filesize after converting at the cost of audio quality. You don't have to do this step, but when I didn't, I ended up with a concert mod that was nearly half a gigabyte in size.

Make sure your file has two tracks, because it should be stereo. Like below:



If it doesn't, here's a quick fix. Select the whole track and hit COPY (Ctrl - C). Delete the track by clicking its 'x' in the top left corner. Then hit Tracks > Add New > Stereo Track. Then hit PASTE (Ctrl - V) to paste the track back in, which should now have two tracks for stereo.

Also make sure the rate is 44100.


Once this is done, EXPORT the track.
File > Export.
File format should be WAV. Save the name to whichever track you want this to replace - here's a reminder of their names.


So if you wanted this to be the first song played, export it as a WAV file named midnightride.wav in the root/sound/music/flu/concert folder.

Now repeat the process with the other three songs.

Why? Because we're going to create a soundcache. Technically it's not always necessary to do this, but we're going to ensure it works right the first time (hopefully).

Your mod folder should be in addons folder, kinda like this:


Now, open L4D2.

In the console, type the following:

snd_buildsoundcachefordirectory addons/[modnamehere]

For example, if your folder was called "kissconcert", the command would be

snd_buildsoundcachefordirectory addons/kissconcert

The command should only take a few seconds and say that it 'touched' four files. If it didn't, you probably messed up a step. Anyway, once it's done, type "exit" into the console to close L4D2.

If your root folder is still in /addons/, that'll put your new VPK into the same place, so you'll be ready to go.

BE SURE you don't leave any other concrt mods enabled.
BE SURE to NOT DELETE your root folder yet. If you made a mistake, you'll want to be able to fix it.

Go ingame and test it out!

Well, that's the basics. Let me know of any other questions you have, or chastise me if I said anything incorrect here.

I won't be covering all the details regarding how to edit and replace textures, but if you are looking for the materials used for concert posters/stage/etc, this may help you: