After a while of practicing the Half-Step Practice Model (as explained in the Barry Harris Workshop DVD booklet), I finally made up some of my own exercises. Here's a good warm up (with scales) that I use on most days ...
Note :
If you have never encountered bebop scales, a good way to start practicing "in time" is this sample rhythm exercise. It employs NO passing tone and is based on C dominant 7th (mixolydian) scale.
Don't know what a bebop scale is?
No problem, watch this.
Without going into too much detail (no spoiler alert here!), Barry Harris has a way of making scales "fit" into bar lines which he calls The Half-Step Practice Model.
This concept stems from the bebop
language ... and it's all about rhythms.
In short, the model is a technique that adds 0, 1, 2 or 3 extra passing notes to regular scales. The end result is the rhythmical alignment of "strong notes on strong beats" within the bar... (meaning we get chord-tones 1-3-5-7 on downbeats)
The three optional passing notes can be found between degree b7 and 3 (in a mixolydian scale). Here, added passing notes in red :
The primary scale, which is, by the way, a great starting point for most teachers (that includes me!), and most commonly referred to as "bebop scale" only has ONE passing note between b7 and 1 (in this case, the "B natural" note).
The most basic
bebop scaleis therefore :
But, obviously, the Barry Harris Workshop goes beyond this simple scale by using two more available passing-tones....
Let's say you wanted to start the scale on something else than the root... it wouldn't always work! Try it and see for yourself. So Barry found a solution to this musical problem...
Let use the "F" (the fourth degree) as an example in the same old, C7 mixolydian scale.
You can have either :
1- NO passing tone added
... or ...
2- Two passing tones!
As you can see, the arrows point to chord tones. Notice how they fall on downbeats after the scale is "rebalanced" because of the presence (or absence) of passing tones.
One more example : starting on the 3rd ("E" note). You can have either :
1- One passing tone
... or ...
2- Three passing tones!
By now, I think you get the idea...
This is just a principle, of course. You have to own the Barry Harris Workshop DVD to really "get it" and understand how it works. It always better to hear the master himself explain it to you!
So, yes : I like the idea behind Barry's Half Step Practice Model very much. I've been working with the Barry Harris Workshop DVDs for years now. ...and yes : I even took the time to write my very own exercises (in mixolydian only) based on the whole approach. Here's what I'm adding though.
My variations on the original concept :
-Each line starts with a pickup of three 8th-notes and
-Each scale degree is treated in two "phases" :
1. Placed on beat "one" (after the pickup)
2. As part of the pickup (beat "four")
Confused?
Basically, if you play them "my way" you'll get all the musical juice from the original Barry Harris Workshop exercises plus a few added bonuses.
A picture is worth a thousands notes, so here's an example ...
I turned this (Original "Barry Harris Workshop" way) :

... into this (Phase one and Phase Two)

Ready?
See below for the complete set of exercises. Don't forget to read the practice suggestions!
Without further ado...
-Discard the paper : Learn the two pages by heart!
-Learn in all keys : Play through cycle of fourth, at first.
1. The whole page in different keys or ...
2. Play one line at a time in 12-keys
Don't forget to check out this literature ... (The Barry Harris Workshop DVDs and The Alan Kingstone Book on the Barry Harris Harmonic Method)

Jazz Guitar Chords and Jazz Harmony