This is a perfectly good way to do it. Faster, by a smidgen, might be just drawing a 10-minute range with smart tool or range tool [R] over your desired track (you still need to ensure correct time span and channel are selected in the export dialog).
I think where the range marker stuff comes in very handy is for multiple sections (or songs) so you can export them all in one go.
EDIT: Obviously if you have any plugins on the master bus you’ll want to select “master” for the channel and if you only want the interviewee’s voice, just solo that track for export.
terminology note: the “Draw tool” in Ardour has nothing to do with this - it is used to create MIDI regions and notes, along with control/automation data points. When @anon60445789 said “draw” he meant using the “Range tool”.
Is this an official binary from ardour.org or from the Ubuntu repository? Are you using ALSA or JACK? Those error codes are above my pay grade but you might try ALSA if you are not using it and also it is always worth trying the official demo version from this website to eliminate any distro compiling issues.
It’s from the Ubuntu repo. I was using Jack but then I switched to Alsa since I’m not recording yet, just receiving the audio files and mixing them into the podcast. Jack gave me so many problems and I have plenty of time to learn it when I do more recording again.
I’m curious, if I become a supporter of Ardour, does that allow me to download the latest version for any platform? At home I use Linux, but I’m a teacher, and whenever we go back to face to face school, I can imagine using Ardour at school with my students, but at school we have mostly Macs.