Key Finder software

[Lauraine Graham- with the Lord]

Does anyone know if there is software available to purchase that informs one of the key that a piece of music is played in? I have a wave file editor with which I change arrangements, and it is very successful for that, but it does not have this facility.

I have been asked to participate in a big charity show in a few weeks' time and I will be performing with real musicians, as opposed to a karaoke track. I haven't done this for more years than I care to mention and I have forgotten how to do this - even when I was professional I was sometimes way out, so my method was obviously less than accurate. I don't want to appear a total prat, as it seems that my participation has been requested by one of the organisers, who must have a very long memory indeed.

Can anyone help, please?

In anticipation of all the advice I hope to receive, many thanks.

Best wishes