Although I’m not a musician, I have an aunt who is. While trying to find everything that she would need to convert to Linux, I found MuseScore, a music score typesetter.

From their official site, the list of features include:

• WYSIWYG, notes are entered on a “virtual note sheet”
• unlimited number of staves
• up to four voices/staff
• easy and fast note entry with mouse, keyboard or midi
• integrated sequencer and FluidSynth software synthesizer
• import and export of MusicXml and standard midifiles (SMF)
• platform independent code for Linux, Windows and Mac
• GNU GPL licenced

You can download MuseScore for Linux, and there is also a test version for Windows. Now I’m one step closer to convincing her to switch.