Consider this I once was watching an English television program several years ago. They brought on several people one had perfect pitch now this person was not born with perfect pitch. Apparently perfect pitch is a thing that you learn from an early age. The other two people did not have perfect pitch having learned there pitch from something that was tuned respectively sharp or flat. Well and this is where I get a bit confused memory wise they placed the person who sang a note flat in a bath of warm water (it could have been cold water) and they then sang the note in perfect pitch. The person who had perfect pitch placed in a bath of hot water sang his previously perfect pitched note sharp in the bath of cold water he sang the note flat (as I say it could have been the other way round it was a long time ago).

My conclusion is that if you place a tuning fork on a radiator the heat will alter its pitch if the tuning fork or instrument is cold it will affect its pitch. As a performer if you become too hot or cold said temperature would affect your ability to pitch perfectly a note. Ever been nervous and starting to sweat then become more nervous because you can't tune your guitar on stage? So use a good quality electronic tuner and tune your instrument at the room temperature. A good quality tuner will have the ability to calibrate its self with your Concertina so those more easily tuned instruments can tune to you. As for the Salvation Army tuning there instruments sharp I know not but if they did or do could it be something to do with the fact that in England especially round Christmas when the weather here is cold. The Salvation Army Bands still perform outside in our Towns and Villages in the cold.

Most of these conclusions are my own and I could be wrong but it makes sense to me! Or am I barking up the wrong tree as they say?