Along the lines of the last question, there is key vs. transposition. For instance, the key may be in Eb and the trumpet part would be in 'F'. Should the ABC program figure out that the different keys for different voices means their transposition.
Actually that doesn't really work because you don't know whether to xpose up or down. We really need a transposition part of the voice header, such as 'xpose=_E,' to indicate that this is transposed to eb, and then down the octave. To subscribe/unsubscribe, point your browser to: http://www.tullochgorm.com/lists.html
