Every blues tune needs a finish, and there’s one ending that’s been standard for as long as anyone can remember — the semitone slide. You’ve heard it a hundred times. That big chord sliding down into the final note, the whole band building together. It’s the most traditional blues ending there is, and once you’ve got it, you can close any 12-bar with confidence.

The 12-Bar Setup in A

For this lesson, I’m using the key of A blues with three chords: A7, D7, and E7. You can play open chords if you like, but I’m using movable voicings — same shape for each chord, just different frets. Makes it easier to see the relationships.

The 12-bar breaks into three groups of four: four bars of A7, then two bars of D7 and two bars of A7, and finally the last four bars. Those last four are where the ending lives.

The Last Four Bars

In a standard 12-bar, the last four go: one bar of E7 (the 5 chord), one bar of D7 (the 4 chord), and then normally you’d play a turnaround to start the cycle over. But when you want to end the song, this is where you swap in the semitone slide.

After the E7 and D7 bars, start on A# (Bb) — that’s one fret above your final A chord. Then slide down to A. That one-semitone movement into the tonic is what makes the ending feel so definitive. It’s the musical way of closing the book.

The Crescendo Makes It

The slide alone isn’t the whole picture — the timing and dynamics are what really sell it. You build into the ending. The volume comes up, the intensity increases, and then everybody lands on that slide together. That crescendo is what separates a regular stop from a proper blues ending.

If you’ve got two guitars in the mix, one player can build with the chord while the other plays a descending scale run. Both converge on the final note and everything ties up clean. Even with a single guitar, you can get that building feel by hitting the chord harder as you approach the slide.

Move It to Any Key

The semitone slide works everywhere. Whatever key you’re in, start one fret above your final chord and slide down. In G, that means starting on Ab and sliding to G. In E, start on F and slide to E. Same move, same satisfying resolution.

The chord voicing doesn’t matter much — open chords, barre chords, or the movable 7th shapes I used here all work. What matters is that you’re starting one semitone above and sliding down with intention. The audience feels the resolution no matter what shape your hand is in.

Next time you’re running through a 12-bar, set up those last four bars and try the ending: E7 for one bar, D7 for one bar, then A# sliding down to A. Focus on the timing first — the slide should feel deliberate, not rushed. Once that’s solid, add the crescendo and let it build.

If you want to loop your 12-bar instead of ending it, check out our blues turnaround lesson for three popular patterns. For a step-by-step breakdown of the chromatic pass note turnaround, try the 12-bar blues turnaround lesson.

For more blues rhythm techniques and patterns, visit our blues rhythm guitar lessons.