Map it slowly
Find B on string 6 at fret 7. Play string 6, fret 7; string 6, fret 8; string 6, fret 10; string 6, fret 11; string 5, fret 8. Use a relaxed position and release pressure between repetitions. String 1 is high E.
Altered · B · Guitar
B Altered scale on guitar
The B Altered scale is B C D E♭ F G A — formula 1 ♭2 ♭3 ♭4 ♭5 ♭6 ♭7, step pattern H–W–H–W–W–W–W. Use it over B7alt: it is the scale for altered dominant chords (7♭9, 7♯9, 7♯5, 7♭13) resolving to a tonic — the V7alt in a ii–V–I. Below, every note is marked on the fretboard in standard tuning; press play to hear it on a synthesized guitar while each note lights up, or tap any fret to sound that note.
Visualizer
B Altered on the fretboard.
Guitar · standard tuning
Piano
RootChord tone (1 3 5 7)Scale toneBeing played
Tempo100 bpm
Show
Sound
Tap any note on the diagram to hear it. Play loops the scale up and down one octave in eighth notes (switch Loop off for a single pass) in the position starting at fret 7. “Show” switches or combines the fretboard and keyboard; “Sound” picks the instrument you hear. Audio is synthesized in the browser.
Your next 10 minutes
Make B Altered part of your playing
Make a short phrase
Play B – C – D as two eighth notes and a quarter note, then rest for two beats. Answer with A – G – F. Use the space to hear the phrase before repeating it.
Hear it in context
Hold or repeat B as a drone. Play each note of B Altered above it, pausing on C and A. Compare their tension with the root. Then improvise using only three notes and two rhythms.
Listen for this: altered dominant chords (7♭9, 7♯9, 7♯5, 7♭13) resolving to a tonic — the V7alt in a ii–V–I. Treat the scale as a palette, not a requirement to play every note. If a note clashes with a chord or melody, resolve it deliberately or leave it out.
Understand the sound
B Altered: from a pattern to a musical choice
Hear F in context
This sound gathers altered tensions around a dominant chord. Its theoretical flat fourth sounds like the major third; chord-symbol spelling often describes the same pitches differently.
In B Altered, degree ♭5 is F. Play B, then F, then B again. Sing the middle note before touching the instrument.
A mistake to avoid
A plain fifth or natural ninth from Mixolydian changes the colour. Choose tensions deliberately, then resolve them into the next chord.
Slow the player to 60 bpm. Record one short phrase and check whether its ending sounds deliberate. Increase the tempo only when you can repeat it without losing the pulse.
B Altered versus B Mixolydian
Shared pitches: B, E♭, A. Pitches in B Altered outside the comparison scale: C, D, F, G. Compare the sounds over the same root, at the same tempo.
Play B Mixolydian on guitar →Your guitar checkpoint
Start with B on string 6, fret 7. The next note C is on string 6, fret 8. Name both notes aloud before playing, then find the same two pitches in another octave.
Before moving on, close the diagram and name the notes: B · C · D · E♭ · F · G · A. Then play a two-bar phrase from memory and leave two bars of silence.
On piano
The same scale on the keyboard.
Reference
B Altered — notes, degrees & intervals.
| Degree | Note | Interval from B | Step to next |
|---|---|---|---|
| 1 | B | unison (0 semitones) | H |
| ♭2 | C | minor 2nd (1 semitones) | W |
| ♭3 | D | minor 3rd (3 semitones) | H |
| ♭4 | E♭ | diminished 4th (4 semitones) | W |
| ♭5 | F | diminished 5th (6 semitones) | W |
| ♭6 | G | minor 6th (8 semitones) | W |
| ♭7 | A | minor 7th (10 semitones) | W |
Chord it implies: B7alt (B – D – F – A). Use it for: altered dominant chords (7♭9, 7♯9, 7♯5, 7♭13) resolving to a tonic — the V7alt in a ii–V–I.
Take it to the bandstand.Practice Radio streams endless changes to play B Altered over through all twelve keys, with the chord and scale shown live — plus ear-training and call & response modes.
▶ Open Practice RadioCommon questions
B Altered FAQ.
What are the notes of the B Altered scale?
B C D E♭ F G A. As scale degrees: 1 ♭2 ♭3 ♭4 ♭5 ♭6 ♭7. It has 7 notes.
What chords does B Altered work over?
B Altered fits B7alt and, more generally, altered dominant chords (7♭9, 7♯9, 7♯5, 7♭13) resolving to a tonic — the V7alt in a ii–V–I.
What is the formula of the Altered scale?
1 ♭2 ♭3 ♭4 ♭5 ♭6 ♭7 — the step pattern from the root is H W H W W W W (W = whole step, H = half step).
How do I play B Altered on guitar?
Start on the root B on the low E string at fret 7, and play the one-octave position shown: E-string fret 7, E-string fret 8, E-string fret 10, E-string fret 11, A-string fret 8, A-string fret 10, D-string fret 7, D-string fret 9. Every B on the neck is a root, so the same shape works in every position where the notes are marked.
Keep going
Altered in every other key.
Same scale on piano · all Altered pages: Altered hub · theory: chord-scale theory.
Other scales from B