sudo apt install tuxguitar-alsa tuxguitar-jsa tuxguitar-oss
go to Tools->Settings->Sound and select Gervill as Midi Port
Gervill
https://askubuntu.com/questions/457321/tuxguitar-no-sound-in-14-04
source: https://www.translatum.gr/forum/index.php?topic=33648.0 μὴ φῦναι τὸν ἅπαντα νικᾷ λόγον: τὸ δ᾽, ἐπεὶ φανῇ, βῆναι κεῖθεν ὅθεν...