similar question [and answer] here … https://forum.audacityteam.org/t/how-to-make-sound-come-from-both-headphones/22367/1
“split stereo to mono” is shown here … http://manual.audacityteam.org/man/Track_Drop-Down_Menu
similar question [and answer] here … https://forum.audacityteam.org/t/how-to-make-sound-come-from-both-headphones/22367/1
“split stereo to mono” is shown here … http://manual.audacityteam.org/man/Track_Drop-Down_Menu