This is pretty cool.  Good work!<p>Couple things come to mind.<p>1. Is there a way to play a selected segment of the music rather than the whole file?  While composing, replaying a segment over and over again is quite common.  Don&#x27;t want to start from the beginning every single time.<p>2. Is there a way to produce music sheet (PDF or PNG) from the source?  There would be really useful.<p>3. Is there a way to format the notes into measures?  I know the | is optional and ignored.  Can the program do reformat and automatically divides the notes into measures?<p>4. Emacs integration would be great.  Using Emacs to edit.  Do ^X^E to execute the program to play the selected segment.