Progression I–IV–vi–V: chords in every key

The loop begins steadily on I. This degree presents the key and gives the singer a secure point from which to start the phrase. In G major, G serves as this home base. When you move to IV, C takes the music away from rest without breaking the continuity. The harmony opens space for a melody that rises or for a gradual entrance by keyboard, bass, and drums.

vi brings a minor color when the ear is already expecting movement. In G major, this degree is Em. It shares notes with the key but changes the weight of the phrase. That is why a worship sequence can become more contemplative on Em without losing direction. The chord does not end the idea. It keeps the loop moving toward V.

V concentrates expectation. In G, D points to G because the dominant occupies the position of greatest pressure before the tonic. If you play G for four beats, C for four, Em for four, and D for four, the final measure asks for a repeat of the first. This return works well in congregational choruses, where the band repeats the same structure while the voice extends a phrase.

You can hear this arc in different Brazilian worship arrangements. A version close to the atmosphere of "A Casa É Sua" might use piano quarter notes, sustained bass, and drums entering in the chorus. An arrangement with the energy of "Ninguém Explica Deus" might use the same logic with more attack and layering. The reference is for observing dynamics and voice leading, not for copying lyrics or a chord chart.

Also compare it with the I–V–vi–IV progression and the vi–IV–I–V progression. Play four measures of each sequence at 70 BPM. The order of the same degrees changes the point of rest, the beginning of the phrase, and the intensity of the arrival at the chorus.

I is the tonic. It functions as a point of arrival and as a reference for the other degrees. In G–C–Em–D, G presents the tonal center. On guitar, let the G bass note speak on beat 1. On keyboard, play G in the left hand and a simple triad in the right. This initial attack helps the singer locate the key before beginning the phrase.

IV has a function of departure and openness. In G major, C broadens the phrase and often works with a melody that rises. You can lengthen the keyboard notes on this chord or open up the guitar strum without speeding up. If the verse is low and restrained, keep C quieter. If the pre-chorus is building, use IV as the first point of expansion.

vi is the minor sixth degree. In G major, it appears as Em. This chord introduces contrast without leaving the scale notes behind. It can support a more intimate vocal line or create an energy drop before V. Avoid treating vi as a new tonal center if the music continues returning to G. The bass, melody, and chord durations need to confirm the main key.

V is the dominant. Its function is to create the greatest pressure to return within the loop. In G–C–Em–D, D leads to G. You can reinforce this feeling with D7, as long as the seventh, F#, does not conflict with the melody. Before applying the extension, play D major for four cycles and notice whether the return is already clear.

Use this logic to hear all progressions by degree instead of memorizing only hand shapes. Today, choose G–C–Em–D, play each chord for four beats, and say aloud: "home, openness, contrast, preparation." Then transpose it to A–D–F#m–E. The function remains, even with different positions and different strings.

The most direct approach uses four measures of 4/4, with one degree per measure. Count four beats on I, four on IV, four on vi, and four on V. In G, the reading is G in the first measure, C in the second, Em in the third, and D in the fourth. Tap your foot on beats 1, 2, 3, and 4 before adding any pattern.

Another option places two degrees in the same measure. You can keep I for two beats, move to IV for two, sustain vi for four, and close with V for four. The count is: G on beats 1 and 2, C on beats 3 and 4, Em in the next measure, and D in the last. This division speeds up the phrase without changing the four degrees.

It is also common to anticipate the change on beat 4. Count "1, 2, 3, 4 and" and play the next chord on the "and." Instead of waiting for the following downbeat to enter C, play C on the last eighth note of the G measure. Use this anticipation only after maintaining four steady cycles with changes on beat 1.

The place where you change needs to interact with the melody. If the voice holds a long note, changing in the middle of that sustain can create tension, but it can also make intonation more difficult. Begin with changes on beat 1. Then test entrances on beat 4 at a low volume. Record two cycles and check whether the change happens together in the guitar, keyboard, bass, and kick drum.

The online metronome helps you separate steadiness from rushing. Start between 60 and 72 BPM for arpeggios and spacious strumming. Move up to 82 BPM when all four changes land together for five consecutive cycles. If the arrangement recalls Brazilian baião worship or a pattern close to forró, test 96 BPM only after mastering the slower pulse.

On guitar, begin with an attack on beat 1 of each measure. Next, try bass on beat 1 and a light strum on beats 2, 3, and 4. This pattern leaves space for the voice and works well in a verse. Use all six strings only when the arrangement calls for more body. If the keyboard and drums already occupy the midrange, play three or four high strings to avoid excessive information.

A continuous eighth-note subdivision creates movement. Count "1 and 2 and 3 and 4 and" and alternate downstrokes and upstrokes. Keep the upstrokes at approximately half the volume of the downstrokes. In the verse, mute some strings with the side of your hand. In the chorus, remove some of the muting and open up the strums during the last two cycles. The tempo remains 72 BPM, but the feeling becomes larger because the dynamics change.

A sertanejo pattern can highlight the alternating bass before the strum. In G, play the G bass on beat 1, a high response on beat 2, the complementary bass on beat 3, and a short strum on beat 4. Do not copy a specific chord chart. Use the idea of alternation to create space between the low note and the chord.

In forró, the subdivision needs to interact with the zabumba, triangle, and accordion. Play short, regular attacks without filling every eighth note. In pagode, shorten the chord durations and leave pauses between attacks. In an MPB arrangement, an arpeggio with bass on beat 1 and high notes on beats 2, 3, and 4 can preserve the clarity of the loop.

You can also use an arpeggio. Play the degree's bass note on beat 1 and distribute the high strings over the following beats. On G, you might play bass on beat 1, a middle string on beat 2, a high string on beat 3, and two light notes on beat 4. The arpeggio emphasizes the duration of each chord and makes vi more noticeable.

In a band, the keyboard can hold long notes while the guitar plays the subdivision. The bass does not need to repeat every root. Combine a sustained G with a more defined entrance on D to reinforce the return. To find other ways to organize the shapes, try the chord generator and check the notes before choosing the register.

Sevenths change the density but do not need to change the function. A D7 on V adds the note C and increases the tension before G. A Gmaj7 creates a more open color over the tonic. On vi, Em7 softens the chord and leaves room for a voice singing long notes. Test one extension at a time. If guitar, keyboard, and bass all add notes at once, the harmony can lose definition.

Use Gmaj7 in the first measure for four cycles and compare it with simple G. Then change only D to D7. Listen to the difference in the return. If the melody uses C over D7, the tension may work. If the melody insists on C# or another note outside the arrangement, return to D major and confirm the vocal line before keeping the seventh.

sus4 works through suspension. In Gsus4, the third, B, is suspended by the note C, and the ear expects resolution to G. The same device appears in Csus4, Dsus4, and Asus4. You can play Dsus4 on beat 4 and resolve to D on the next beat 1. Then play Dsus4–D–G to hear the preparation and return clearly.

sus4 should not compete with the melody. If the voice sustains the chord's third during the suspension, the clash may be intentional or may sound uncomfortable. Play the passage at 60 BPM, listen to the vocal note, and decide. Do not turn every chord into sus4. Use the suspension on an entrance, in the last measure of the pre-chorus, or at the end of a cycle.

Inverted bass changes the movement of the low end without changing the main degree of the phrase. In G–C–Em–D, you can try G/B to lead the bass from G to C by stepwise motion. Another option is C/E before Em, when the bass needs to rise from C to E. Confirm the reading with the bass player. The inversion should reinforce the direction, not create a new tonal center.

To study the subject more securely, review intervals in the music theory section. Write the notes of G major: G, A, B, C, D, E, and F#. Then mark the third of each chord. This exercise takes less than five minutes and prevents you from choosing an inversion only because the position feels comfortable in your hand.

For the first three minutes, choose a comfortable key and say the degrees aloud: I, IV, vi, V. Do not play yet. Imagine the arc and mark four beats per degree. Then play only one attack on beat 1 of each measure. In G, use G–C–Em–D, but focus mainly on the function of each stage. If you sing, sustain a simple note in each measure and observe when it blends or creates tension.

For the next five minutes, keep the metronome between 60 and 72 BPM. Play the loop for four cycles with one strum per beat. Then do four cycles with eighth notes and four cycles as an arpeggio. Record your phone from a distance of 30 centimeters and listen for whether the changes land together. The device microphone affects the recording, so use this take to track consistency, not to seek a laboratory measurement.

For the next four minutes, practice one change at a time. Do two cycles with the change on beat 1. Do two cycles with IV entering on beat 4. Then sustain vi for two measures and keep V for two measures. Do not change the tempo, key, and pattern at the same time. If you change three variables, you will not know which one caused the error.

For the final three minutes, test one arrangement variation. Use Dsus4 on beat 4 before returning to G. In another cycle, use D7. In the following cycle, return to simple D. Compare the three versions and choose the one that keeps the melody clearest. Sing with neutral syllables such as "na" or "la," without reproducing lyrics from copyrighted songs.

When this routine is solid, apply the sequence in A: A–D–F#m–E. Then test C: C–F–Am–G. Keep the same tempo and subdivision. If the changes remain precise for eight cycles, choose a pattern associated with sertanejo, forró, pagode, or MPB and apply it only during the final minute. Compare the result with other gospel music options.

• Hear I as rest, IV as openness, vi as contrast, and V as preparation.
• In G major, practice G–C–Em–D. Count four beats per chord before testing two-beat subdivisions.
• Begin with changes on beat 1. Anticipate the change on beat 4 only after maintaining five steady cycles.
• Change the pattern, register, and dynamics before changing the chords in the loop.
• Use sevenths, sus4, and inverted bass with one alteration at a time and controlled volume.
• Use 60 to 72 BPM to study function and clarity. Test 82 BPM or 96 BPM only when the pulse remains steady.
• Record your phone from about 30 centimeters away and evaluate synchronization, remembering that the microphone changes the captured result.
• Study for fifteen minutes a day. Divide the time among degrees, pulse, pattern, variation, and transposition to another key.