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# MSU-1 Setup Guide
## What is MSU-1?
MSU-1 allows for the use of custom in-game music. It works on original hardware, the SuperNT, and certain emulators.
This guide will explain how to find custom music packages, often called MSU packs, and how to configure
them for use with original hardware, the SuperNT, and the snes9x emulator.
## Where to find MSU Packs
MSU packs are constantly in development. You can find a list of completed packs, as well as in-development packs on
[this Google Spreadsheet ](https://docs.google.com/spreadsheets/d/1XRkR4Xy6S24UzYkYBAOv-VYWPKZIoUKgX04RbjF128Q ).
## What an MSU pack should look like
MSU packs contain many files, most of which are the music files which will be used when playing the game. These files
should be named similarly, with a hyphenated number at the end, and with a `.pcm` extension. It does not matter what
each music file is named, so long as they all follow the same pattern. The most popular filename you will find is
`alttp_msu-X.pcm` , where X is replaced by a number.
There is one other type of file you should find inside an MSU pack's folder. This file indicates to the hardware or
to the emulator that MSU should be enabled for this game. This file should be named similarly to the other files in
the folder, but will have a `.msu` extension and be 0 KB in size.
A short example of the contents of an MSU pack folder are as follows:
```
List of files inside an MSU pack folder:
alttp_msu.msu
alttp_msu-1.pcm
alttp_msu-2.pcm
...
alttp_msu-34.pcm
```
## How to use an MSU Pack
In all cases, you must rename your ROM file to match the pattern of names inside your MSU pack's folder, then place
your ROM file inside that folder.
This will cause the folder contents to look like the following:
```
List of files inside an MSU pack folder:
alttp_msu.msu
alttp_msu.sfc < -- Add your ROM file
alttp_msu-1.pcm
alttp_msu-2.pcm
...
alttp_msu-34.pcm
```
### With snes9x
1. Load the ROM file from snes9x.
### With SD2SNES / FXPak on original hardware
1. Load the MSU pack folder onto your SD2SNES / FXPak.
2. Navigate into the MSU pack folder and load your ROM.
### With SD2SNES / FXPak on SuperNT
1. Load the MSU pack folder onto your SD2SNES / FXPak.
2. Power on your SuperNT and navigate to the `Settings` menu.
3. Enter the `Audio` settings.
4. Check the box marked `Cartridge Audio Enable.`
5. Navigate back to the previous menu.
6. Choose `Save/Clear Settings` .
7. Choose `Save Settings` .
8. Choose `Run Cartridge` from the main menu.
9. Navigate into your MSU pack folder and load your ROM.
## A word of caution to streamers
Many MSU packs use copyrighted music which is not permitted for use on platforms like Twitch and YouTube.
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If you choose to stream music from an MSU pack, please ensure you have permission to do so. If you stream
music which has not been licensed to you, or licensed for use in a stream in general, your VOD may be muted.
In the worst case, you may receive a DMCA take-down notice. Please be careful to only stream music for which
you have the rights to do so.
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##### Stream-safe MSU packs
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Below is a list of MSU packs which, so far as we know, are safe to stream. More will be added to this list as
we learn of them. If you know of any we missed, please let us know!
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- Vanilla Game Music
- [Smooth McGroove ](https://drive.google.com/open?id=1JDa1jCKg5hG0Km6xNpmIgf4kDMOxVp3n )
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- Zelda community member Amarith assembled the following list for the purpose of competitive restreams. While we have not ourselves verified this list, all submissions required VoD proof they were not muted. Generally speaking, MSU-1 packs are less safe if they contain lyrics at any point. This list was only tested on Twitch and results for other platforms may vary. [Restream-Safe List ](https://tinyurl.com/MSUsApprovedForLeagueChannels )
