Not just guitar audio! I own a tube amp for my guitar and 2 tube amps for driving my higher-end headphones! They are neat little pieces of electronics history, not just in how they run, but also because most of the best tubes are old military surplus. My oldest pair are from 1945 and were made for early army/navy radar systems.
Totally lost my sense of smell for about 2 weeks, but it came back pretty quickly. The worst long term symptom has been a substantially heightened gag reflex. Talking while chewimg gum has become a balancing act or I start heaving, just brushing my molars is enough to trigger gagging some days, and brushing my tongue after my teeth is a sprint to avoid puking. It’s trash.