@ John Sturdy - your 2nd comment
"Google won't find me any pictures of medieval musicians eating, instruments at the ready. I must therefore stand corrected, and assume they all starved to death."
You looked for medieval pictures. You should have looked for medieval videos instead.
Unfortunately the medieval folks here didn't have the technology to put English subtitles in their medieval videos, but if you skip to 3:45 you can see the people who were medievally singing and playing earlier on, sitting at a medieval table with medieval food on it.