Wikipedia:Articles for deletion/Capella (notation program)
was  even done? On top of the two above, a quick books search finds The Instrumentalist (magazine) Volume 62 - Page 114, that passes  but I agree sources are scarce
— User:Widefox, 16:56, 16 September 2018 (UTC)
Stance: keep
Cited policy: WP:BEFORE||WP:GNG (Wikipedia:Articles for deletion)