Well, as I was taught, the "original" changes are pretty much just "Bb" (or
Bb F7 Bb F7) for the first 4 bars. There are a ton of ways to create
movement on a static tonic chord, of which I vi ii V7 is one. The G7 for a
VI7 chord is already a substitution. There are a lot of other ways it can
be played.
A common move on first 4 measures of Rhythm is to play from the I6 to the
IV6 chord and back using a diminished to connect them chromatically (like
the Basie "tag" figure). I'd probably notate it as: Bb6 Bbo7 Eb6 Bbo7 Bb6,
or Bb/D Dbo7 Cm7 Dbo7 Bb/D, but what you describe from the Baker book makes
sense (can't find my copy right now to corroborate). That Gb7 chord is
probably in the inversion with Db in the bass right? That means it's acting
like a Dbo7, and the F7sus is that voicing he likes to use with C in the
bass, so it's really just a Cm7 chord (or an Eb6 inversion). It may be in
some other inversion, but the main thing will be that you'll hear a
chromatic line that just moves down and back up to the tonic when you play
it.
You can't always go by what Mickey Baker calls things. The progression is
basically right. Just play them and listen, if the voices sound good, be
happy.
Musically Yours,
Rick Stone
website: http://www.rickstone.com
Listen to clips from my new CD "Samba de Novembro" with Tardo Hammer, Yosuke
Inoue and Matt Wilson at http://www.cdbaby.com/cd/rickstone
And drummer Al Ashley's CD "These Are Them" featuring Dave Leibman, Rick
Stone and Oliver Von Essen at http://www.cdbaby.com/cd/alashley
Post by TomsonI agree. It's not exactly standard, far from it.
It's an old and common substitution, though. One recording where it it
Gm7 / Gb7 / F7sus/ Gb7
"U'n'I" has no bridge, it's just this vamp and a melody.
I have wondered a lot myself how this version came about. It's not
Bbmaj7 / G7 / Cm7/ F7 or Dm7 / G7 / Cm7 / F7 or bars 5-6, 13-14 and
29-30: Bb / Bb7/D / Eb / Edim
but it seems to be a way to play around the tonic chord Bbmaj7 and the
dominant F7sus, they are surrounded by this weirdo Gb7 that makes it a
wonderful vamp in itself.
Or does anyone have a better explanation for this one? I agree that it
was a very bad idea from the author of this book to supply this version
as the only example of rhythm changes. It's a very special case and
that should have been pointed out, if it had to be included at all.
Overall, I like this book, I learned a lot from it myself, some twenty
years ago - but something like rhythm changes, which is one of the big
corner-stones of jazz along with the blues should have been explained
from the bottom up and not with this strange example...
JMHO,
Tomas Karlsson
http://www.tomaskarlsson.com/