The random singer can be a dangerous beast but sometimes its the only thing to do!

I have to transpose "in my head" because I play manual bass pedals which don't trasponse.

The relative key is not usually a problem; I seem to learn songs "serially" so once the key is established the rest of the song is played automatically; I appear to remember the chord intervals as the song progresses!

Nevertheless it is strange how you usually end up in Db... or F# Minor!