performous-composer binary package in Ubuntu Focal armhf

 Composer is a song editor for creating (and converting) notes for music
 games in various formats. It attempts to make the process easy by
 automating as much as possible while providing a simple and attractive
 interface to do the remaining manual work.
 .
 Key features of Composer include:
 .
  * Song pitch analysis based on the esteemed algorithms from Perfomous.
  * Zoomable interface to quickly get an overview or doing very precise timing.
  * Possibility to synthesize the notes to get a feel of their "sound".
  * Import/export in various formats including:
    * SingStar XML
    * UltraStar TXT
    * Frets on Fire MIDI
 .
 Composer has a rather distinguished workflow: for example, the lyrics are
 imported as a whole and each time you manually put a note in place, the
 others automatically adjust to take use of the new information in providing
 a better guess of the pitch and timing. In a sense, you are not actually
 creating a song, but fixing and tuning the result of what the computer
 thinks the notes should be like.

Source package