MurkyMark
kennywtelejazz
...to truly hear how powerful diatonic math mode is , all one has to do is take a simple Bach 2 part invention midi file. Place it in SONAR and then transpose both parts as per diatonic math. Go through a few Keys.
With each successive diatonic transposition the song is played using a different Modal Tonality as a Home Base .
All of Bach's original math and phrases are kept intact yet they are being played as per a new tonality ...
One has to hear it to believe it .....IMHO it is mind blowing 
Mind blown just by the concept! I'll be trying it (I'm a huge fan of the two part inventions and have messed with them for about 40 years now).
Yes , by all means give it a try ...IIRC, some real interesting sounds happen when you transpose his music diatonic up a 3rd , 4 th 5th ...downward transpositions also contain very nice changes .. it is certainly worth the time and effort

Anyway , much of what has been giving me problems here has very little to do with affecting Bach's music in a negative way .
I absolutely love taking his music and doing the transpose midi as diatonic ...the parts sound amazing and what ever little chromatic blip that may happen where the note gets snapped to a scale grid still sounds very musical to me .
Bach was a genius , I was very fortunate to have studied with a Jazz / Studio Guitar Player named Barry Galbraith . Barry not only wrote a book of Bach's 2 part inventions transcribed as guitar duets in friendly keys for guitar players he also had a guitar quartet comprised of 4 of his best students . The quartet played many of Bach's fugues and many other composers highly complex multi part music ...Vivaldi was another composer there were charts for ....Barry would play Bass so there was really 5 of us
Anyway I was very fortunate to have been one of the 4 guitarists in his guitar quartet and I still love Bach to this day

even though I lost my reading and playing chops from back then
have a good one all the best ,
Kenny