How to Make Son Cubano Music
Son Cubano is the origin of salsa. From the clave and tres guitar guajeo to coro-pregon call-and-response, this is the complete production guide to Cuba's most influential genre.
Step 0: Detect Your Reference Track Key First
Before you programme a single clave hit, detect the key.
The tres guitar guajeo, bass tumbao, and vocals must all be in the same key. A key clash in Son Cubano is immediately obvious because the clave locks every instrument together rhythmically, and any harmonic mismatch is exposed by the repetitive, looping structure. Use BeatKey to detect the key of your reference track or vocal recording before building anything else.
Step 1: Son Cubano BPM and Styles
The Son Cubano Sweet Spot: 108-115 BPM
108-115 BPM captures the relaxed swing of traditional son while maintaining energy. Son Montuno pushes to 120 BPM+ as it transitions toward the salsa sound. Start at 112 BPM and adjust based on the energy of your coro hook.
| Style | BPM | Key | Character | Artists | Tip |
|---|---|---|---|---|---|
| Traditional Son | 100-110 | A/D minor, C major | Intimate, acoustic, tres guitar lead, maracas, Trova style | Trio Matamoros, Sexteto Habanero, Compay Segundo | Keep percussion sparse. Let the tres guitar carry the melodic weight over the clave. |
| Son Montuno | 110-125 | A/D minor, G major | Faster, more percussive, piano montuno enters, direct ancestor of salsa | Arsenio Rodriguez, Beny More, Bebo Valdes | The piano montuno should interlock with the clave, not double it. Play on the off-beats. |
| Guajira-Son | 100-112 | C/G major, E major | Countryside character, major key brightness, guitar-forward, pastoral feel | Trio Matamoros, Jose Fernandez Diaz, Celia Cruz | Use major key progressions I-IV-V7-I for the bright, rural Cuban sunshine feel. |
| Bolero-Son | 90-105 | A/E minor, D minor | Slower, romantic, bolero influence, intimate vocals, guitar arpeggios | Beny More, Rodrigo Prats, Frank Dominguez | Blend the bolero guitar arpeggio style with the son clave feel for the hybrid groove. |
| Changui (Son Origin) | 95-110 | E/A minor | Oldest son variant, Eastern Cuba, tumba francesa influence, raw acoustic feel | Grupo Changui de Guantanamo, Elio Reve | Changui uses a looser clave feel. The tumbadora plays syncopated patterns not heard in later son. |
| Nuevo Son (Modern) | 108-118 | A/D minor, G major | Contemporary production values, electric bass, electric guitar, modern recording | Buena Vista Social Club, Ibrahim Ferrer, Omara Portuondo | BVSC-style production: warm but modern, clean recording with authentic vintage instrumentation. |
Step 2: The Son Clave - Everything Locks to This
The Single Most Important Rule: Programme the Clave First
The son clave is a 2-bar rhythmic pattern that governs every instrument in Son Cubano. The tres guitar, bass tumbao, bongo martillo, piano montuno, and vocals must all align to the clave. A composition that breaks clave sounds fundamentally wrong to any trained Latin ear. Before you place a single bass note or guajeo hit, programme the clave pattern and let it run for the entire track.
The 2-3 Son Clave (most common): Bar 1 has 2 hits. Bar 2 has 3 hits.
| Element | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clave (2-3) | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . |
| Clave (Bar 2) | X | . | . | . | . | . | X | . | X | . | . | . | . | . | . | . |
| Bass Tumbao | . | . | . | . | . | . | . | X | X | . | . | . | . | . | X | . |
| Maracas | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x |
| Bongo Hi | x | . | x | . | x | . | x | . | x | . | x | . | x | . | x | . |
| Bongo Accent | . | . | . | O | . | . | . | . | . | . | . | O | . | . | . | O |
The tres is a Cuban guitar with three courses of doubled strings (6 strings total, tuned in 3 pairs). It has a brighter, more percussive attack than the Spanish guitar and is the defining melodic voice of son cubano. The tres plays the guajeo, a syncopated repeating melodic-rhythmic pattern that interlocks with the clave.
Tip: Program the guajeo pattern starting on the and of beat 2 (bar 1 of the 2-3 clave) for authentic son placement. The tres avoids landing on the downbeats.
The claves play the son clave (2-3 or 3-2 pattern) throughout the entire song. Every other instrument must align to the clave. The 2-3 son clave is the most common: Bar 1 has hits on beats 1 and the and of 2. Bar 2 has hits on beat 1, and of 2 (slight delay), and beat 4. In modern DAW production, programme the claves first before any other element.
Tip: If your instrumentation breaks clave, the entire arrangement will feel rhythmically wrong even if the notes are correct.
The bongo plays the martillo (hammer pattern), a rapid repeating pattern on the small drum with syncopated accents on the large drum. The bongo is the lead percussion voice in son, more prominent than in salsa where it is often subordinate to the conga. In quieter son arrangements, the bongo carries the rhythmic conversation with the tres.
Tip: The martillo pattern: constant 8th notes on the small bongo with accents and open tones on the large bongo on beats 2, 4, and syncopated positions.
Maracas play constant 8th notes throughout the song, providing the rhythmic subdivision over the clave. In son they are felt more than heard, providing a warm shimmering presence. Tune the maracas sound (use EQ to roll off below 800 Hz) to keep them in the upper rhythmic register without competing with bass or bongo.
Tip: Pan maracas slightly left and bongo slightly right to create spatial separation in the stereo field.
The bass plays the tumbao, a syncopated pattern that anticipates beat 1. In son the tumbao is simpler than in salsa: it often plays on beat 1, the and of 2, and beat 4 (with the last note anticipating the next bar). The bass must stay in clave. An upright bass tone (warm, round, wood-fundamental) is essential for authentic son sound.
Tip: The most important rule: the bass anticipates beat 1. Instead of landing ON beat 1, the bass arrives on the and of beat 4 of the previous bar.
Son Cubano vocals follow the coro-pregon call-and-response structure. The pregonero (lead vocalist) improvises over the coro (fixed chorus hook sung by backing vocalists). The coro establishes the harmonic center and the pregonero responds, improvises, and extends. This structure is the direct ancestor of salsa's same call-and-response form.
Tip: Record the coro first, then layer the pregonero improvisation over it. The coro should be simple, memorable, and harmonically static.
Step 3: Son Cubano Chord Progressions
The Son Cubano Harmony Rule: Always V7, Never Plain V
Every dominant (V) chord in Son Cubano is a dominant 7th. E7 not E in A minor. G7 not G in C major. D7 not D in G major. The flat 7th creates the tension that resolves beautifully back to the tonic. A plain V chord without the 7th sounds like Spanish folk music, not son cubano.
The minimum Son Cubano. Repeats endlessly. Simple, hypnotic, roots-deep.
Tip: This two-chord loop is the foundation of hundreds of Son Cubano recordings. Keep it simple, add complexity with rhythm and melody instead of chords.
Complete harmonic resolution. Most common in traditional son introductions.
Tip: The iv chord (Dm in A minor) adds a brief dark turn before the V7 resolution. Classic son harmonic movement.
Bright minor, lifted quality. The IV major chord over a minor root is the Dorian signature.
Tip: This is the chord move that makes son feel both dark and warm simultaneously. D major not D minor over an A minor root.
Andalusian-influenced descending bass line. Melodic, flowing, slightly Spanish in character.
Tip: The descending bass line Am-G-F-E7 gives the tres guitar a natural melodic line to follow. Great for montuno piano figures.
Bright, festive, Guajira-Son countryside character. Celebratory and warm.
Tip: Major key son is associated with rural Cuba (guajira) and has a sunlit, outdoor festival quality.
Longer harmonic journey. Used in formal son compositions and bolero-son crossovers.
Tip: The bIII (C major) brightens the progression before the bVI (F) descends back toward the V7 resolution.
Step 4: Common Son Cubano Keys - Hz Reference
Tune your bass tumbao and tres guitar guajeo to the exact root Hz of your key. Use notes.beatkey.app to get precise Hz values for any note.
| Key | Root Hz | 5th Hz | Camelot | Son Cubano Use |
|---|---|---|---|---|
| A minor | 440 Hz | 659 Hz | 8A | Most common son minor key. Natural, comfortable for voice and tres guitar. |
| D minor | 293 Hz | 440 Hz | 7A | Deep, warm minor. Used in slower, more romantic son and bolero-son crossovers. |
| E minor | 330 Hz | 494 Hz | 9A | Slightly tenser minor. Common in changui and more dramatic son compositions. |
| C major | 261 Hz | 392 Hz | 8B | Bright, open major. Classic guajira-son key for festive, rural Cuban character. |
| G major | 196 Hz | 294 Hz | 9B | Warm, resonant major. Common in son montuno and upbeat festive sones. |
| F major | 349 Hz | 523 Hz | 7B | Warmer major, slightly darker than C or G. Used in son-bolero crossovers. |
Step 5: Son Cubano Song Structure
| Section | Bars | Elements | Energy | Production Note |
|---|---|---|---|---|
| Intro (Diana) | 4-8 | Claves + bongo, then tres guitar guajeo enters | Low | The diana introduces the rhythmic feel before melody. Establish clave immediately. |
| Tema (Theme) | 16-32 | Full ensemble, lead vocal sings the composed theme melody | Medium | The tema is the composed, written section. Vocalist sings the fixed melody over the clave groove. |
| Montuno Section | 32-64+ | Coro hook, pregonero improvisation, full percussion | High | The montuno is the open-ended call-and-response section where the energy peaks. Can extend indefinitely. |
| Piano Montuno (Son Montuno only) | Throughout | Piano plays interlocking ostinato figure over the clave | High | Only in Son Montuno variant. Piano plays a 2-4 bar repeating figure that interlocks with the clave. |
| Improvised Pregon | Variable | Lead vocalist improvises over fixed coro harmony | Peaks | The pregonero extends the song by improvising responses to the coro. This is the emotional peak. |
| Instrumental Break | 8-16 | Tres guitar or piano solo, full percussion continues | High | Mandatory in traditional son. The instrument solo is the melodic climax before the final return. |
| Final Montuno | 16-32 | Return of full coro-pregon, energy sustained | High | Final section brings back the coro hook with full energy. Songs often end by repeating the coro to a fade. |
| Outro (Fade) | 8+ | Repeat coro, fade or stop | Decreasing | Traditional son fades out on the repeating coro. Modern recordings often use a stop ending. |
The Coro-Pregon is Non-Negotiable
Son Cubano is built around call-and-response. The coro (fixed choral hook) establishes the harmonic center. The pregonero (lead vocalist) improvises responses over the coro. Without this structure, the music loses the interactive quality that gave son its social function in Cuban communities and its direct influence on salsa's same call-and-response form.
Step 6: Mixing Son Cubano
| Element | Priority | EQ | Compression | Pan | Effects |
|---|---|---|---|---|---|
| Lead Vocals (Pregonero) | Highest | High pass 100 Hz. Presence boost 2-5 kHz for clarity. | Gentle 4:1, slow attack 20 ms, fast release 80 ms | Center | Short room reverb (0.8 s). Pre-delay 12 ms for intimacy. |
| Coro Backing Vocals | High | High pass 200 Hz. Cut 400 Hz for mud clarity. | 3:1, medium attack, bus compression for ensemble glue | Wide stereo L 40 / R 40 | Same reverb as lead but slightly longer tail for depth. |
| Tres Guitar (Guajeo) | High | High pass 120 Hz. Presence at 3 kHz for pick attack. | 3:1, medium attack 15 ms to preserve pick transient | Slight right (R 20) | Small room reverb only. No delay. Tres should feel dry and present. |
| Upright Bass (Tumbao) | High | High pass 40 Hz. Warmth boost at 200 Hz. Cut 500 Hz for clarity. | 4:1, fast attack 5 ms, medium release | Center | Minimal. Let the natural upright resonance carry the warmth. |
| Bongo + Claves + Maracas | Medium | High pass 200 Hz on maracas. Bongo: presence at 2-3 kHz. | Bus compression 4:1 on full percussion buss | Bongo R 20, Claves L 20, Maracas L 10 | Short room reverb (0.5 s) on percussion buss only. |
| Master Bus | Final | High shelf boost 10 kHz at +1 dB for air and brightness. | 2:1 gentle glue compression, 3 dB gain reduction max | Stereo | Target -13 to -11 LUFS integrated. Son Cubano is intimate, not loud. Preserve dynamic range. |
BPM-Synced Delay Times (100-120 BPM)
| BPM | Quarter Note (ms) | Dotted 8th (ms) | 8th Note (ms) | 16th Note (ms) |
|---|---|---|---|---|
| 100 | 600 | 450 | 300 | 150 |
| 105 | 571 | 429 | 286 | 143 |
| 108 | 556 | 417 | 278 | 139 |
| 110 | 545 | 409 | 273 | 136 |
| 112 | 536 | 402 | 268 | 134 |
| 115 | 522 | 391 | 261 | 130 |
| 120 | 500 | 375 | 250 | 125 |
Use delay.beatkey.app for any BPM. Dotted 8th delay (green) adds the slapback echo common in vintage son recordings.
Mastering Target: -13 to -11 LUFS Integrated
Son Cubano is intimate acoustic music, not club-oriented. Target -13 to -11 LUFS to preserve the dynamic range of the acoustic instruments, especially the natural decay of the tres guitar and the breath of the upright bass. Over-compressing or limiting to -9 LUFS removes the spatial quality that makes son feel like it was recorded in a real room.
6 Free Son Cubano Production Tools
Detect the key of any Son Cubano reference track before building your arrangement.
Find son chords: im, V7, iv, bVII, IV (Dorian) for your chosen key.
Get exact Hz values for bass tumbao root notes and tres guitar tuning.
BPM-synced delay times at 100-120 BPM for tres guitar echo and vocal ambience.
Explore Dorian, Aeolian, and Ionian scales used in Son Cubano production.
Full genre production guide series: salsa, cumbia, merengue, bachata, bolero, vallenato, and more.
6 Common Son Cubano Production Mistakes
Programme the clave first. Every instrument must be checked against the clave before recording or sequencing. A single out-of-clave instrument ruins the entire arrangement.
The son tumbao anticipates beat 1. Place the bass note on the and of beat 4 of the previous bar (one 8th note early). Landing directly on beat 1 makes it feel like straight rock bass, not son.
The tres guajeo avoids the downbeats. Start the guajeo pattern on the and of beat 2 or beat 4. Playing on beats 1 and 3 makes it sound like strummed pop guitar, not son.
Son Cubano is built around call-and-response. Record the coro (fixed hook) first. The pregonero improvises or extends over the coro. Without this structure, the music loses its interactive, community character.
Use BeatKey to detect the key of any reference track or vocal sample before programming claves or bass. A key mismatch in son creates a clash between the tres guajeo, bass tumbao, and vocals that cannot be fixed in mixing.
Traditional Son Cubano is a small ensemble: tres, bass, bongo, claves, maracas, and 2-3 voices. Adding too many layers removes the essential breathing room and intimacy that defines the genre. Less is more in son.
Son Cubano Production FAQ
What BPM is Son Cubano music?
Traditional Son Cubano runs 100 to 115 BPM. Son Montuno (the faster variant that became salsa) runs 110 to 125 BPM. The sweet spot for modern production is 108 to 115 BPM. Start at 112 BPM if unsure.
What key is Son Cubano in?
A minor and D minor are most common for emotional, melancholic sones. C major and G major are used for bright, festive sones (Guajira-Son). The Dorian mode (minor with a major IV chord) is especially characteristic of son's bittersweet harmonic quality.
What chord progressions are used in Son Cubano?
The classic two-chord vamp (im-V7) is the minimum viable Son Cubano. The four-chord turnaround (im-iv-V7-im) adds a complete harmonic journey. The Dorian vamp (im-IV with a major IV chord) gives the characteristic warm-minor feel. All V chords are dominant 7ths. Never use a plain V chord without the flat 7th.
What is the difference between Son Cubano and Salsa?
Son Cubano is the parent genre of salsa. Son uses acoustic instrumentation (tres, upright bass, bongo, claves, maracas) and originated in Cuba in the early 1900s. Salsa added a full horn section, piano montuno, congas, and faster tempos when Cuban son musicians moved to New York in the 1960s-70s. Son is intimate and acoustic. Salsa is urban and orchestrated.