Disklavier

Step time programming for a Mark IV Pro using Yamaha's full XP SMF is 
possible--I know someone who has been done it.  It is hardly practical 
to do so, however.  For one thing, I'm not aware that Yamaha has openly 
published the XP SMF definition. You might have to discover that for 
yourself through reverse engineering.  Second, a sequencer such as 
Cakewalk could be used, but would be highly impractical--you would want 
a custom programmed sequencer for that job.

As you probably know,  the resolution of note velocity in XP SMF is over 
a thousand steps.  You might question how many are the least number of 
steps different in velocity, typically, to enable you to detect a 
difference in sound level in the same note. (In my experience with a 
lowly Mark II DC3 with its 127 steps of velocity, it takes more than a 
few steps difference in velocity  for me to detect a difference. It 
would take a still larger change in velocity of an individual note 
within a reproduced piece to be detected by most listeners.)

You surely have your reasons for considering step programming.  Most 
people who try it soon realize that musical notation is at best only an 
approximate representation of a fine musical performance--a mere guide 
to the performer.  In terms of efficiency in producing good music, step 
programming simply doesn't compete with playing and recording live.

heritage_flowline wrote:

>Hi group,
>
>What I`d really like to know is
>can you fully take advantage of a Mark IV PRO`s extra features from a 
>computer?
>In other words can you program in step time a Mark IV PRO by inputing 
>the extra MIDI data as well as the usual note on`s and velocity? is it 
>feasable?
>
>Also which other MIDI controllers does the XP format actually use and 
>how?
>
>info much appreciated,
>
>thank you
>robert.
>
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-- 
Robert Welcyng
Anchorage, Alaska