it is possible to map a midi note to another midi note. For example, can =
a scale be represented as midi numbers, like 64 66 68 69 etc, signifying =
C D E F, and then to map that to 70 72 73 as the output, for example? So =
an input note (the key pressed on the piano keyboard for example) gets =
outputted as a different note. <<<
This would not be difficult, as a transposition mechanism would simply add to or subtract from a given note number. This would be done "at the top", i.e. immediately upon input, or, if a series of note numbers is saved in a container such as a field or variable, before the series is translated into MIDI data.
>>>I can see that perhaps code can be = written into a standalone midi file processor and, when a midi file is = imported into it, can change the output of the midi file, and these = changes can be saved to another midi file. <<<
Here's the difficult part though: it's much more straightforward to create a MIDI file from piano-style keyboard entry or HyperCard-style representations than it is to import an external MIDI file (as I've mentioned before, many MIDI files contain proprietary and/or hardware-specific data which would have to be filtered out). However, in the long run, MIDI file import would probably be the way to go, as opposed to a HyperCard-style shorthand, since the core of the "Standard MIDI File" (SMF) is a generally accepted way to share MIDI data.
If the goal is to enable transfer of data only between applications that "understand" the HyperCard-style shorthand, then the job is likely considerably easier.
In any case, since you mentioned that you are new to programming, I have to say that I don't think that working with MIDI is a reasonable first programming project (unless you already understand how MIDI works). Once you get familiar with Revolution, take a look at the MIDI Builder stack (included with Revolution 2), and you might get some ideas as to how to implement the first part of your question, above.
HTH, Kurt
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