Never assume that what you are now will be what you will always be!

Particularly when it comes to painting yourself into a corner with technical stuff. Data lasts forever, and sometimes it’s worth accepting a mild inconvenience now for potentially massively less work in the future to undo something you think may be inconsequential now.

Yes, I agree, it’s a shame that you can’t override an SMF’s master tuning on a global basis, but this was a decision the MMA made nearly forty years ago when they set the standards for MIDI. 440Hz was, and still continues to this day as the almost worldwide tuning standard, and with the limited capability of electronics back then, I guess they had to settle for the simpler solution.

I’d still be interested in whether you’ve done a proper double blind test to test whether you really CAN tell the difference without a sand pattern. It is so easy for the mind to convince the body they are hearing and seeing things they aren’t simply because the brain is telling them they OUGHT to hear or see it!

Be cautious of sites that advocate for 432hz. A TRUE double blind test makes sure the listener has no way to compare directly, and would make you listen to atonal noise for long enough that the brain could not remember the pitch of the previous example. Only that way are you finding out whether you can truly distinguish a pitch from its sound, not from comparison to another sound.

Maybe you’re one of the lucky ones (or cursed ones, depending on how much playing at 440hz might hurt!), but it never hurts to find out if an aesthetic decision turns out to be an actual one. Especially if it involves making a lot of extra work for yourself!