Lesson browser Piano and music theory lessons Previous: Playing in G major and F major Next: Three beats and compound time

Minor keys and accidentals

A minor shares notes with C major, but not its tonal home

A natural minor uses A, B, C, D, E, F, G, A. It has no sharps or flats in its key signature, just like C major. They are relative keys. The key signature alone therefore does not prove which note feels like home; endings, bass notes, and harmonic context matter.

The natural-minor step pattern is whole, half, whole, whole, half, whole, whole. Play the scale and listen to its distance pattern. A minor is not defined by playing a C-major scale while simply calling it sad.

Use the printed right-hand fingering, 1–2–3–1–2–3–4–5. The higher register is deliberate; keep the hand moving with the scale and do not try to cover the full octave in one fixed spread.

A natural minor

Selected event 1: A4 · 1 beat · Right-hand finger 1

Stopped. Select a note with Next note, or play with sound.

Show note names below the staff

Right hand. Finger numbers: 1 thumb, 2 index, 3 middle, 4 ring, 5 little. Chord finger groups read from lowest note to highest. 4/4 · key Am.

Bars 1–2. Right: A4 B4 C5 D5 | E5 F5 G5 A5

Tempo: 60 quarter-note beats per minute. The count-in lasts 4 beats. Durations in the selected-note readout use quarter-note units. Tempo changes and Reset stop playback and select the first note. Audio starts only on request, plays once, and stops when hidden or off-screen. The tones are synthesized pitch guides, not a piano recording. A short release gap separates notes. Next note advances to the next attack in either hand. Held notes stay highlighted. There is no moving cursor. Start at low device volume.

Compare minor with major at the same starting point

The A-natural-minor score starts at A4 and ends at A5. Its first bar contains A4, B4, C5, D5, with fingers 1, 2, 3, 1. Bar 2 continues E5, F5, G5, A5 with fingers 2, 3, 4, 5. Every note is a quarter note. This gives a controlled comparison with the major scales because the duration pattern and crossing plan are familiar. The new issue is where the whole steps and half steps occur, not a new kind of rhythm.

Trace the first three pitches on the instrument. A to B is a whole step, but B to C is a half step. The first half step arrives one move earlier than it does in a major scale. D to E is a whole step, and E to F is the second half step. F to G and G to A are both whole steps. The sequence therefore differs from major even though every key in this particular natural-minor scale is white.

White keys do not define minor. The earlier C-major scale also used only white keys, and F major included a black key without becoming minor. What matters here is the interval pattern measured from the chosen starting note. The same physical C5 occupies position 3 when counted from A, but position 1 when counted from C. That change of reference explains why sharing a collection of pitches does not make two keys identical.

Use a comparison that keeps A as the reference. Play A, C, E successively, then A, C-sharp, E as a separate example. The first outlines the A-minor triad; the second outlines A major. Only the middle pitch changes. These triads connect the scale's third position to a familiar chord construction. You are not being asked to learn an A-major scale or change the printed study. Restore C-natural before returning to its first bar. Listen for the changed interval above A rather than assuming that faster playing, a lower register, or a quieter volume is what makes the example minor.

Raise the seventh when the music asks for it

A harmonic minor raises G to G-sharp. G-sharp lies a half step below A and often gives a stronger pull toward it. The large F-to-G-sharp gap is three semitones. It is written as a second by letter name and called an augmented second.

In conventional classical exercises, melodic minor raises both the sixth and seventh ascending, giving F-sharp and G-sharp, and often returns to natural minor descending. Actual music can use these pitches in different directions. Read what is written rather than applying an automatic rule to every descending phrase.

A harmonic minor

Selected event 1: A4 · 1 beat · Right-hand finger 1

Stopped. Select a note with Next note, or play with sound.

Show note names below the staff

Right hand. Finger numbers: 1 thumb, 2 index, 3 middle, 4 ring, 5 little. Chord finger groups read from lowest note to highest. 4/4 · key Am.

Bars 1–2. Right: A4 B4 C5 D5 | E5 F5 G#5 A5

Separate a shared signature from a tonal home

The natural-minor score has no sharps or flats in its key signature. That agrees with its white-key collection, but the empty signature alone would also fit C major. The score's title and its deliberate ascent from A to A identify the scale exercise. A piece of music needs more context. Look for where phrases settle, what the bass supports, and which chords surround an ending. The first note need not be the tonic. A C-major phrase can begin on E, one of the notes in its C-major chord.

The tonic is a point of musical reference, not a note that must sound continuously. An A-minor phrase can contain many Cs and still be organized around A. The relative-key relationship says that C major and A natural minor share their signature. It does not say that every passage with that signature must be equally well described by either key.

Explore this without adding more notation to the page. Find A, C, E in a comfortable register and play them successively, then finish on A. In a separate trial, find C, E, G and finish on C. Keep the tempo and approximate loudness alike. The shared C and E do not prevent the different final notes and chord collections from establishing different reference points. This is a small demonstration of context, not a test that proves how every listener must describe a longer piece.

Now inspect the natural-minor score while imagining an ending on its penultimate G5 rather than the final A5. You have stopped on position 7, one whole step below the tonic. Restore the final A and compare the sense of arrival. That interval becomes especially useful when you inspect harmonic minor next. Avoid turning this into a rule that all minor music sounds one emotion. Tempo, articulation, register, and harmony can change a piece's character without changing its key. The concrete evidence available in these two scale scores is their pitch content and the distances between neighboring notes.

An accidental has a local lifetime

A sharp beside G changes later Gs at the same written octave in that bar unless a natural cancels it. At the next bar line, the key signature applies again. In the example, the second G-sharp does not need a repeated sharp. The natural sign restores G-natural before the bar ends. A tie can carry an altered sound across a bar line without a new attack; we will study ties separately.

Read the accidental, then the bar line

Selected event 1: G♯4 · 1 beat · Right-hand finger 2

Stopped. Select a note with Next note, or play with sound.

Show note names below the staff

Right hand. Finger numbers: 1 thumb, 2 index, 3 middle, 4 ring, 5 little. Chord finger groups read from lowest note to highest. 4/4 · key Am.

Bars 1–2. Right: G#4 G#4 G4 A4 | G4 E4 A4

Locate the one change in harmonic minor

Place the natural and harmonic A-minor scores in your reading sequence and compare corresponding positions. Both begin A4, B4, C5, D5. Both continue E5 and F5. Position 7 changes from G5 to G-sharp5, and both finish on A5. The printed fingers remain 1, 2, 3, 1, 2, 3, 4, 5. The change therefore asks finger 4 to find a different physical key, not to insert an extra note between F and A.

Count semitones from F5 to G-sharp5. F to F-sharp is one, F-sharp to G is another, and G to G-sharp is the third. Yet the written letter names still move from F to G, which makes the interval a kind of second. Its larger size gives the name augmented second. From G-sharp to A there is only one semitone. Raising G changes both intervals around it, just as raising F did in G major, but the resulting complete scale pattern is different.

Why call the altered note G-sharp rather than A-flat when both names can identify the same key on this keyboard? The scale already has an A as its final note and needs a form of G in position 7. G-sharp names that relationship. Writing A-flat followed by A-natural would use the same letter for two successive positions and conceal the seventh-to-tonic relationship. Read the score's spelling rather than substituting a name based only on the black key's location.

Use the end of bar 2 for a comparison that isolates the change. Play E5, F5, G5, A5 with the natural-minor fingering, then E5, F5, G-sharp5, A5 with the harmonic-minor fingering. Keep the four durations equal. If G-sharp arrives late, first locate it without time; do not make the augmented second into a longer note. The larger pitch distance does not imply a longer duration. If the different route is uncomfortable, release and move between notes during slow exploration. The score does not require F and A to remain depressed together.

At the keyboard

Compare natural and harmonic A minor at the same tempo. Identify the changed note before assigning an emotional label.
Find G-sharp as the black key between G and A. Practice F–G-sharp–A slowly with fingers 3–4–5.
Read the accidental-reset example without audio first. Name the altered notes and where the natural takes effect.
Play an A-minor triad, A–C–E, then end on A. Compare that ending with a C-major triad followed by C.

Read accidentals as instructions with a scope

The accidental-reset score is not another ascending scale. Its first bar repeats G4 before moving to A4. Read it as G-sharp4, G-sharp4, G-natural4, A4, each lasting one quarter beat. Finger 2 plays all three written G positions, and finger 3 plays A. The repeated letter and repeated finger make the changing accidental the main reading problem. If you use only the contour of the noteheads, you will miss the change between the second and third notes.

The first sharp remains active for the next G at the same written octave within that bar. The second G therefore stays sharp without needing another sharp sign. The natural before the third G cancels that alteration. A natural is an instruction to use the unaltered letter name, not an instruction to play whichever key was used most recently. Here it sends finger 2 from the black G-sharp key to the white G key. It does not affect the following A.

Bar 2 begins G4, E4, A4. Its G is natural under the empty key signature. E4 lasts one beat and the final A4 lasts two. The quarter, quarter, half pattern completes the four-beat bar. A half note does not count as two separate presses. Keep finger 3 on the final A for its written duration rather than repeating it on beat 4. This rhythm difference matters because bar 2 has only three attacks while bar 1 has four.

An accidental beside a note normally has a narrower scope than a key signature. In this lesson's ordinary single-line examples, it governs that pitch at that written octave until cancellation or the bar line. Do not extend the first G-sharp to every G in every octave merely because a key signature would affect them all. Also do not erase it after the first attack. To read the displayed example silently, track the current instruction for G4 across the four beats, then start the next bar under the signature again. The natural in bar 1 and the next bar's signature agree here, but they are separate reasons for playing G-natural.

Notice that repeating finger 2 in the accidental example does not mean keeping the key down. The first and second G-sharps are separate quarter notes with no tie. Release enough to produce a new attack at beat 2, then move to G-natural for beat 3. This contrasts with the final A half note, which has one attack and a longer duration. The same finger can repeat a key, move to a neighboring key, or hold a key. The note values and pitch instructions determine which action is needed; a finger number alone does not.

Keep scale forms separate from performance decisions

Natural, harmonic, and melodic minor describe useful pitch patterns, but they do not replace the score. In A melodic minor as a conventional ascending exercise, F becomes F-sharp and G becomes G-sharp. That reduces the large F-to-G-sharp interval found in harmonic minor. The upper route becomes E, F-sharp, G-sharp, A. Two whole steps lead into the final half step. This explanation concerns the pitch pattern; there is no separate melodic-minor playback score on this page.

Compare that imagined route with the actual harmonic-minor bar before playing it. The written score keeps F-natural. If you raise F because you remember that ascending minor can use two raised notes, you have changed this exercise. Similarly, direction alone does not cancel an accidental. A descending passage may retain a raised note if the notation says so. Use the conventional descending melodic-minor pattern only when that is the exercise requested, not as an automatic correction to written music.

There is also a difference between identifying pitches and judging an expressive effect. The G-sharp-to-A half step can support a clear arrival on A, especially with harmony that supports it. An isolated scale cannot demonstrate every harmonic use of that note. Do not conclude that every G-natural in A minor lacks purpose, or that a composer must always choose G-sharp before the tonic. Natural minor and harmonic minor offer contrasting material, and actual music can use both within a larger context.

For a practical reading check, cover the optional note names and inspect just the two second bars. Identify which key finger 4 will play in each before starting. Then play with equal quarters and compare your intended notes with the visible spelling. If the harmonic version unexpectedly contains F-sharp, you imported a rule from another form. If both versions contain G-natural, you missed the local sharp. If the notes are correct but the last A arrives early, the remaining problem is timing rather than minor-key knowledge. These distinct outcomes tell you which part to inspect next without requiring the page to listen or grade your playing.

Exercises and readiness checks

Separate relative keys

Does a score without sharps or flats have to be in C major?

Hint

A natural minor has the same key signature.

Worked answer

Check the written music

Right hand. Finger numbers: 1 thumb, 2 index, 3 middle, 4 ring, 5 little. Chord finger groups read from lowest note to highest. 4/4 · key Am.

Finger numbers identify the hand’s planned route. Read the relevant passage alongside the worked answer; these are the same pitches and durations used by playback.

No. A minor shares that signature. Look at the phrase endings, bass, and harmony to identify the tonal home. A score can also contain modal or changing-key music, so a key signature is evidence, not a complete harmonic analysis.

Change one scale degree

Which pitch changes from A natural minor to A harmonic minor?

Hint

The changed pitch is immediately below the upper A.

Worked answer

Check the written music

Right hand. Finger numbers: 1 thumb, 2 index, 3 middle, 4 ring, 5 little. Chord finger groups read from lowest note to highest. 4/4 · key Am.

Finger numbers identify the hand’s planned route. Read the relevant passage alongside the worked answer; these are the same pitches and durations used by playback.

G becomes G-sharp. The other scale notes stay A, B, C, D, E, and F. The final G-sharp-to-A step becomes a semitone, while F-to-G-sharp becomes three semitones. Do not also raise F unless the music or exercise asks for melodic minor.

Follow cancellation and reset

In the accidental example, why are the first two Gs sharp but the first G in bar 2 natural?

Hint

Read the local accidental, the natural sign, and the following bar line.

Worked answer

Check the written music

Right hand. Finger numbers: 1 thumb, 2 index, 3 middle, 4 ring, 5 little. Chord finger groups read from lowest note to highest. 4/4 · key Am.

Finger numbers identify the hand’s planned route. Read the relevant passage alongside the worked answer; these are the same pitches and durations used by playback.

The first sharp applies to the repeated G in bar 1. The printed natural cancels it for the later G in that bar. Bar 2 starts under the unaltered A-minor signature, which has no G-sharp. No new sharp is present there, so its G is natural.

These studies were written for this course. Reference audio is synthesized, with no microphone input or automatic grading. The scores use locally generated VexFlow notation and remain available offline. Long scores have a printable view; no pedal is required to use the lesson.

References and scope

MusicTheory.net lessons provide further explanations of notation, rhythm, and chords. Open Music Theory is a longer reference. The keyboard diagrams, exercises, and rock-style study here were made for these lessons. The Beethoven example uses a public-domain melody, transposed to C, not a modern published arrangement.

Robert Hutchinson's Music Theory for the 21st-Century Classroom provides optional explanations of staff notation. Its sections on meter, major-scale construction, inversions, and chord symbols support the corresponding theory explanations. These references do not assess physical technique or certify a playing level.

Casio CT-S300 product information is the reference for the likely instrument. The lessons do not depend on a particular button sequence, USB connection, or automatic accompaniment.

Lesson browser Piano and music theory lessons Previous: Playing in G major and F major Next: Three beats and compound time