Hi Matt,

I think what the original poster was meaning was the Roman numeral notation uses the original key set in BIAB as the reference for all chords whether or not the key is changed during the course of the song.

For example, consider the progression (set BIAB to key C for the start) C F G7 C7 (now change to key F) F Bb Gm C7 F.

In Roman numerals from a theoretical perspective this is [C:] I IV V7 I7 [F:] I IV IIm, V7, I. In BIAB if the key starts out as C and is then changed to F at the appropriate place (using F5), the Roman numeral notation in BIAB gives [C:] I IV V7 I7 [F:] IV bVII Vm I7 IV.

Hope this information helps the wish list readers at PG Music.

Regards,
Noel

Last edited by Noel96; 12/13/11 05:59 AM.
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