<key> (Non-Traditional)
<key>
<key-step>B</key-step>
<key-alter>-1</key-alter>
<key-accidental>quarter-flat</key-accidental>
<key-step>E</key-step>
<key-alter>-2</key-alter>
<key-accidental>slash-flat</key-accidental>
<key-step>A</key-step>
<key-alter>-2</key-alter>
<key-accidental>slash-flat</key-accidental>
<key-step>F</key-step>
<key-alter>2</key-alter>
<key-accidental>sharp</key-accidental>
</key>