Hi John,
In answer to your question - it depends why you wish to transpose
If you just wish to change the 'pitch' of the keyboard, so that you can sing along with the entire MIDI sequence, (because the sequence does not match your vocal range) but not play the keyboard following 'the dots', then yes, your method will work fine.
However, our friend Casarosa implied that he wanted to play along with the MIDI file and using your method would not work in that scenario. Using the Transpose buttons on the KN7000 front panel, just shifts the actual 'pitch' of ALL the notes played on the keyboard, be they live or sequenced - it does not actually Transpose the sequence in the true sense of the word.
With no Transpose buttons active, if you press a 'C' on the keyboard, you will hear a true 'C' being played. Use the Transpose buttons to lift the 'pitch' by 2 semitones, press the 'C' key again and you will hear a note pitched at 'D' although you are still actually pressing the 'C' key. This is perfectly OK if you are just playing live and even following 'the dots' but will not work if you wish to play along with a sequence, which has been recorded in a different key, to your written part.
For instance, assume that you have a sequence which has been recorded in the key of 'D major' but your written part is in the key of 'C Major'. If you just use the Transpose buttons to shift the pitch of the KN7000 down by two semitones, this will certainly lower the PITCH of the sequence to 'C Major', but, when you try to play along with the sequence, following the written part (ie playing the notes in the key of 'C Major') the sequence and the parts you play, will still be two semitones apart, which won't sound too good
The only real solution to this particular problem is to truly Transpose the entire MIDI sequence as described above, to match the key of your written part, unless of course you are really clever and can transpose and play the written part on sight!! Now that IS clever
Bernie, I also agree with you - the editing facilities provided in the KN7000's Sequencer, Composer and Sound Editor are second to none. Trying to do operations, which are so easy in the KN7000, on say a Tyros - Non starter........