In plain words
Barry’s rules are for runs that start on the beat, on ‘one’. Start the same run on the ‘and’ and, he said, you have to do the opposite rule: the tonic, which takes one added note from the beat, takes none; the second, which takes none, takes one. He added that this is exactly the sort of thing that has to be practised.
Half-step rules on the dominant scale, part 25:22
With pickup notes, ask which note falls on the beat and follow its rule. In Barry’s example the line goes from the tonic up to the third and then runs down; the second lands on the beat, so you use the second’s rule, no half steps. Begin with a triad instead and the note on the beat called for one half step.
For a triplet start, generally follow the rule for the triplet’s second note. A triplet on the third and fourth takes the fourth’s rule (no half steps); one on the second and third takes one half step. Barry found the triplet on the tonic and second awkward and called it an exception: first he gave it one half step, because the seventh then falls on the beat, then settled on none.
Barry called this really important and said it will happen a lot. In his ‘Confirmation’ lesson, the C7 scale run down to the third of A7 comes out right from the beat, but started on the ‘and’ it needs a triplet on F and G, and only at that spot; you have to feel when. Started from F instead, running up to C and coming down with the tonic-to-seventh half step, the line went straight down.
Step by step
Starting on the ‘and’ of a beat, reverse the rule: the tonic takes no added note, the second takes one.
C7, C on the ‘and’ of 1: nothing added- C
- B♭
- A
- G
- F
- E
- D
- C
C7, D on the ‘and’ of 1: one added note- D
- C
- B
- B♭
- A
- G
- F
- E
Half-step rules on the dominant scale, part 25:22Jazz School Online (Howard Rees), Glossary of Terms ¶10
After pickup notes, find the first note that lands on a beat as the line comes down and use its rule.
C and E, then D on beat 2: no added note (Howard Rees)- C
- E
- D
- C
- B♭
- A
- G
- F
- E
- D
- C
C–E–G, then G on beat 2: one added note (Howard Rees)- C
- E
- G
- F
- E
- D
- C
- B
- B♭
- A
- G
- F
- E
Half-step rules on the dominant scale, part 10:000:32Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶6Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶8
Starting with a triplet, use the rule for its second (middle) note; the triplet on the tonic and second is the exception.
Triplet B♭–C–B, middle note C: one added note, taken into the triplet (Howard Rees)- B♭
- C
- B
- B♭
- A
- G
- F
- E
- D
- C
Half-step rules on the dominant scale, part 11:452:17Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶5
If you run up first and the top note lands on the beat, come down with the top note’s rule: Barry ran up from F to C and came down with C’s rule, one half step between the tonic and the seventh.
C7: F up to C, then down with C’s rule- F
- G
- A
- B♭
- C
- B
- B♭
- A
- G
- F
- E
Confirmation13:21Howard Rees, Part 1: Scales & Chords / Part 2: Scale Rules ¶18
an added note, outside the scale
How he said to practise it
Practise starting on the ‘and’ a lot, not only on the beat; Barry asked for exactly this while running major scales from each degree.
The 1998 workshop, part 337:00Half-step rules on the dominant scale, part 25:22
Take a run that works from the beat, start it on the ‘and’, and play straight eighths until the one spot where it needs fixing; put the triplet there and nowhere else.
Write the rules down, including the ones for pickups and triplets, and practise them rhythmically.
Half-step rules on the dominant scale, part 12:52
In Barry’s words
Each one plays from the moment he says it. Every other moment he teaches it is listed below.
These rules are for on the beat. That’s on the one. But if I started on the [and] of the one, I’d have to do the opposite rule.
That note falls on the beat, the second, so I would follow the rule for the second. No half steps.
I would say, follow the rule for the second note of the triplet.
If you start on the beat, you come right down... it goes perfect. But if you start on the [and] of the beat, you’ve got to do a triplet with that F and that G.
Where this comes from
Everything above is drawn from these. Open any one to check it.
Every moment he teaches it12 moments in 4 recordings
Each time opens the transcript there; the video plays when you are online.
Half-step rules on the dominant scale, part 2
- 5:22
The rules are for starting on the beat; on the ‘and’, use the opposite rule (tonic none, second one).
Half-step rules on the dominant scale, part 1
- 0:00
From the tonic up to the third, then down: which note falls on the beat decides the rule.
- 0:32
The second lands on the beat, so no half steps; starting with a triad needs one.
- 1:11
Triplet starts: on tonic and second the seventh falls on the beat; then second and third.
- 1:45
General rule: follow the triplet’s second note; the tonic–second triplet is the odd one.
- 2:17
Third–fourth triplet takes the fourth’s rule; the tonic–second case settled as no half steps.
Confirmation
- 11:02
‘Confirmation’ lesson: C7 down to the third of A7, started on the beat, comes out perfectly.
- 11:35
Started on the ‘and’ it needs a triplet on F and G; says this will happen a lot.
- 12:46
Play straight; put the triplet only at the one spot where it is needed, by feel.
- 13:21
Start on F, run up to C, then the tonic-to-seventh half step: the line goes straight down.
- 13:57
A student starts on the ‘and’ of two and the run goes straight down; he compares the triplet version.
The 1998 workshop, part 3
- 37:00
Tells the class to practise starting on the ‘and’ a lot.
From the lessons1 lesson, 3 points
Notes taken from Barry’s classes, each tied to the moment it comes from.
Starting off the beat, or with pickups
- Idea
Barry said these half steps are put in so that we can practise rhythm. The rules assume you start on the beat, on ‘one’. If you start on the ‘and’ of the beat, you apply the opposite rule: start the tonic off the beat and you use no half step; start the second off the beat and you use one.
Half-step rules on the dominant scale, part 25:22
- Exercise
When a dominant-scale line starts with pickup notes, use the rule for whichever scale note lands on the beat. Go from the tonic to the third and then run down in eighths, and the second lands on the beat, so follow the rule for the second: no half steps. For a triplet start, generally follow the rule for the triplet’s second note: a triplet on the third and fourth takes the fourth’s rule (no half steps); one on the second and third takes one half step. A triplet on the tonic and second is the awkward case: Barry called it an exception, at first giving it one half step because the seventh then lands on the beat, and later saying no half steps.
Half-step rules on the dominant scale, part 10:000:321:452:17
- Exercise
Barry called this really important. Run the C7 scale down to the third, A. Started on the beat, it comes out perfectly. Started on the ‘and’ of the beat, you have to put in a triplet on F and G. Play straight eighths and use the triplet only at the one spot where it is needed; you have to feel when. Another way: start on F, run up to C (which becomes the tonic of C7), and put a half step between the tonic and seventh as you come down; done that way, the line went straight down.
In writing7 notes
What his interviews, his students’ class notes and other teachers’ articles add.
Howard Rees turns this into six line-building recipes on C7: run up a chord from a half step below and use the rule for its top note; use the rule for the starting note; for the middle note of a triplet; or for the note on beat 2 after a short pickup.
Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶3Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶4Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶5Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶6Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶7Howard Rees’ Jazz Workshops, Using the Extra Note Rules to Build Lines ¶8
Rees’s glossary calls Barry’s opposite rule ‘the rule is reversed’: an even number of extra notes where an odd number would normally go, or the other way round.
The ‘miscellaneous rule’: start on any degree, run up to any other, then come down using the rule for the starting note. A Rees book, as quoted on jazzguitar.be, adds that if the added note would fall on the beat, it goes at the bottom of the phrase.
Jazz School Online (Howard Rees), Glossary of Terms ¶9jazzguitar.be members (usernames kept per post), Barry Harris “miscellaneous rule” (jazzguitar.be forum thread) ¶5
Galliano’s notes add trill starts: an eighth-note triplet trill follows the rule of its upper note, a sixteenth-note trill the rule of the first note of the group.
Frédéric Galliano, Notes on the Method of Barry Harris ¶114Frédéric Galliano, Notes on the Method of Barry Harris ¶115Frédéric Galliano, Notes on the Method of Barry Harris ¶117Frédéric Galliano, Notes on the Method of Barry Harris ¶118
Odd and even degrees only sort the rules if the line starts on the downbeat. Start on F in C on the ‘and’ and the E lands on the beat, so an added note is needed after all.
jazzguitar.be members (usernames kept per post), Quick start guide to Barry Harris line building ¶12jazzguitar.be members (usernames kept per post), Quick start guide to Barry Harris line building ¶13
A line that starts the 2–1 rule on an off-beat slips out of step with the beat; every rule example in the workbook starts on the beat.
jazzguitar.be members (usernames kept per post), The Barry Harris Half-Step Practice Model (jazzguitar.be forum thread) ¶77jazzguitar.be members (usernames kept per post), The Barry Harris Half-Step Practice Model (jazzguitar.be forum thread) ¶78
One player’s shortcut avoids separate rules for upbeats and triplets: decide only when the root, second or third reaches a downbeat (root: must add the note below; second or third: may).
jazzguitar.be members (usernames kept per post), Official Barry Harris Thread (jazzguitar.be forum thread) ¶1552jazzguitar.be members (usernames kept per post), Official Barry Harris Thread (jazzguitar.be forum thread) ¶1553jazzguitar.be members (usernames kept per post), Official Barry Harris Thread (jazzguitar.be forum thread) ¶1555
How other teachers explain it6 videos, 3 series episodes
Barry’s students, and their students, teaching it their way. A second opinion, not Barry.
- Extra Note Rules Applications for Line Building
Rhythmic starts for the rules: the starting note, a triplet’s middle note, chords on each degree.
9 min, transcript On YouTube
- Extra Note Rules Yet More Applications!
Pickup starts (tonic–third, tonic–second–tonic, a triad): the note on beat two decides the rule.
7 min, transcript On YouTube
- How to Apply the “Rules” to Build Lines
Run up a chord from a half step below on the ‘and’; its top note’s rule brings you down.
5 min, transcript On YouTube
- Reversing the Rules EP 56 TILF Barry Harris
Episode 56: reversing the rules.
11 min, transcript On YouTube
- Barry Harris Method: Rhythmic Drill ()
A rhythmic drill on the Barry Harris method.
4 min On YouTube
- THIS Is How You Play Bebop Like the Masters | Barry Harris Half-Steps and Triplets
Half steps and triplets.
11 min On YouTube
In the teaching series
Episodes on this idea in the long series by other teachers. Each name opens that whole series in order.
Where the accounts differ1 point
The triplet on the tonic and second is unsettled. Barry first gave it one half step, because the seventh then falls on the beat, then said none, by the rule of the second note. Howard Rees also calls it odd, and fits the flat second in as the triplet’s third note.
Half-step rules on the dominant scale, part 11:112:17Extra Note Rules Applications for Line Building7:27
Read further6 links
These open on the web.
Free to read
- jazzguitar.be members (usernames kept per post), Quick start guide to Barry Harris line building
— Forum thread on Barry Harris line building, including what changes when a line starts off the beat or with a triplet.
- jazzguitar.be members (usernames kept per post), Things I learned from Barry Harris Study Group
— Study group working through Chris Parks’s episodes, with players’ questions about the half-step rules and triplets.
- YouTube
— Chris Parks’s free videos, including an episode on reversing the rules.
- Jazz School Online
— Howard Rees’s lessons on line building with the extra-note rules and triplets (paywalled).
Books and paid courses
- Frederic Galliano, Notes on the Method of Barry Harris (HTML + PDF, updated Jan 2026): scale exercises, chromatic scale, Parker ideas, families, 4 chord scales, moving in fourths, 5-4-3-2, half-step tables, important arpeggios, scale outlines of blues/rhythm/Cherokee/Donna Lee/How High the Moon/Night in Tunisia
attendee-of-videos notes (from Chris Parks’ TILF + Labyrinth + Kingstone) — Free notes on which rule applies after triplet and sixteenth-note trill starts.
- The Barry Harris Workshop Video (Part 1), Howard Rees / Jazz Workshop Productions: 4+ hours, 5 clinic segments + 102-112 page workbook (ABCs, scales on song forms, movable chords, rhythm section, vocalizing)
Barry himself (produced and transcribed by Howard Rees) — Barry’s workshop video and workbook, whose rule examples and ‘miscellaneous rule’ this idea builds on (paywalled).