MUS File Extension

What is MUS file?

MUS file format is a music notation format used by Finale software and several other applications developed by MakeMusic. The file contains only musical notation data without actual audio data. MUS file format was replaced by MUSX format starting with Finale version 2014.

Similarities with MID file format

Data in MUS files are saved in MIDI format, which makes them similar to MID files, however MUS files contain additional information used only by MakeMusic program.

Programs which support MUS file extension

Below you will find an index of software programs that can be used to open MUS files divided into 2 categories according to system platform supported. Files with MUS extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Updated: 01/14/2020

How to open file with MUS extension?

There can be multiple causes why you have problems with opening MUS files on given system. What is important, all common issues related to files with MUS extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The list below will guide you through the process of addressing the encountered problem.

Step 1. Download and install SmartMusic

The main and most frequent cause precluding users form opening MUS files is that no program that can handle MUS files is installed on user’s system. This one is an easy one. Select SmartMusic or one of the recommended programs (for example, MakeMusic Finale, Finale, PrintMusic) and download it from appropriate source and install on your system. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. The safest method of downloading SmartMusic installed is by going to developer’s website () and downloading the software using provided links.

Step 2. Update SmartMusic to the latest version

If the problems with opening MUS files still occur even after installing SmartMusic, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of SmartMusic is available. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. If you have an older version of SmartMusic installed, it may not support MUS format. The most recent version of SmartMusic is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Assign SmartMusic to MUS files

If you have the latest version of SmartMusic installed and the problem persists, select it as the default program to be used to manage MUS on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

Change the default application in Windows

• Clicking the MUS with right mouse button will bring a menu from which you should select the Open with option
• Click Choose another app and then select More apps option
• The last step is to select Look for another app on this PC option supply the directory path to the folder where SmartMusic is installed. Now all that is left is to confirm your choice by selecting Always use this app to open MUS files and clicking OK.

Change the default application in Mac OS

• Right-click the MUS file and select Information
• Find the Open with option – click the title if its hidden
• From the list choose the appropriate program and confirm by clicking Change for all....
• Finally, a This change will be applied to all files with MUS extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Check the MUS for errors

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the MUS file in question. Problems with opening the file may arise due to various reasons.

1. The MUS may be infected with malware – make sure to scan it with an antivirus tool.

Should it happed that the MUS is infected with a virus, this may be that cause that prevents you from accessing it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. MUS file is infected with malware? Follow the steps suggested by your antivirus software.

2. Check whether the file is corrupted or damaged

Did you receive the MUS file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. It could happen the the download process of file with MUS extension was interrupted and the file data is defective. Download the file again from the same source.

3. Verify whether your account has administrative rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Verify that your device fulfills the requirements to be able to open SmartMusic

If the system is under havy load, it may not be able to handle the program that you use to open files with MUS extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with Finale Notation Format files and ensure security of your device and operating system. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle MUS files.

Do you want to help?

If you have additional information about the MUS file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on MUS file.