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The speed of sound depends on the pressure/density ratio, but if the temperature is unchanged, when the pressure drops the density does too, so there is no net effect on sound velocity or the pitch of a horn. Pressure change might affect your emotional state, though. I always feel peppier after a storm front passes through.

Doc wrote: Seriously,
The change in pressure could have had some effect on your inner ear. Any ear popping or pressure?

Doc

If I'm practicing and I sound like crap, I've found a good ear pop usually fixes things. Apparently if they get stuffy (or whatever) all I hear is the buzz inside my head, so it's like playing with earplugs.

Go figure.

I've found a good ear pop usually fixes things.

I too have found this to be the case. Something to keep in mind with cold and flu season bearing down soon. I think I must have OD'ed on Benadryl once when I had a terribly stuffy head cold over a two-concert weekend.

Miah,
I hope you are safe.
Everyone at Rameshori Buddhist Center in Atlanta is praying for the safety and security of all beings in the South East.
Bill Pritchard

Funny, I was practicing during the storm yesterday, and I STILL sounded as bad as the previous time I played. Maybe the barometric pressure will stabilize, and then I'll sound OK. I'm hoping for the best.

Something happened. I sound better today than yesterday. Oh, maybe it was the fact that I had four days of not playing before yesterday.