I joined this site for the sole purpose of learning how to put custom music into a game (in my case Hexen, but this should work for any game Zdoom can run.)
Thanks to a very patient and welcoming community, I finally came up with an easy to understand step by step way to do so.
I thought others with the same question might want to know this, as I know I had quite a time understanding the directions I was given initially.
So here it is:
- Go to http://doomwiki.org/wiki/Music and scroll down to the list of games. Click on the game you wish to mod music into, and note the names of the tracks for every level in your game. Determine which music goes with which level, and rename your audio tracks those names accordingly.
- Download Slade 3 from here: http://slade.mancubus.net/index.php?page=downloads and install it. I used default settings.
- Open Slade. Click File > New > WAD Archive
- Select all of the audio tracks you wish to mod into the game in question, and drag them into Slade. Wait for the list of tracks to fully populate (should be instantaneous unless you're on a very slow machine.)
- Go to File > Save As and enter whatever name you want for your music mod wad.
- Close Slade, and when asked if you wish to close it, click Yes.
- Click and drag the saved wad you just created directly into Zdoom on your desktop, or wherever it is.
- When Zdoom opens after doing this, select the game you're trying to mod, and then launch as normal. The songs will now automatically replace the vanilla in-game songs, and will be correctly applied to their appropriate levels, provided you named them correctly in step 1.
- Repeat every time you wish to run the game with this music. Simply skip dragging the music wad into Zdoom if you want to get back to the vanilla in-game tracks.
Peace.