+1Maybe it was in the 12 pages of this thread already, but why not just tune your bass a half step down like the guitars? I find having less tension on the strings a gift for longer gigs.
A plus to tuning down: you won’t get random people who want to sit in with their harmonica.
I'll never understand all this angst about tuning down 1/2 step. I had never done it until about 15 years ago. I showed up for an audition and when I got there they said, "We tune down 1/2 step." I tuned down 1/2 step, we never had a single discussion about keys, what we called them, or anything else. We never had a single misunderstanding either. I understood that they looked at the 5th fret on the E string and called it an A regardless of how we were tuned, without any prompting.
This aint rocket science.
