musescore is a software application that can be used to manage and delete instruments in a music score. The application is available for free on the internet. There are a few ways to use musescore. The first way is to open the application and select the instrument you want to delete. Then, click on the Delete button. The second way is to open the application and select the instrument you want to save as a file. Then, click on the Save As button. The third way is to open the application and select the instrument you want to add as an extra track in your music score. Then, click on the Add Track button.