AI Music R&B
R&B is all about the voice: smooth runs, soft delivery, lots of emotion, with minimal production so the vocal stands out.
2 songs. Create one like this.
R&B on MuziAI has 2 AI-sung sample songs, and they are unusually alike: both at 100 BPM, both in D-flat major, both on the same seventh-chord loop, Ebm7 Ab7sus4 Dbmaj7 Bbm7. The takeaway: R&B here is one fixed harmonic frame, and the differences live in song structure and voice. This describes MuziAI's samples, not the rules of R&B.
Measured profile
| Metric | Value |
|---|---|
| Sample songs | 2 |
| Tempo (BPM) | 100 (both) |
| Key | D-flat major (both) |
| Length | 175-177 s |
| Bars | 74 and 73 |
| Chords per bar | 0.99 (both) |
| Melodic range | 17 and 24 semitones |
| Note density | 1.42 and 1.20 notes/s |
| Voice, language | 1 female, 1 duet; 2 Vietnamese |
The figures come from the sheet music (ABC notation) the singing model writes with each song. The loop's four chords are the ii, V, I and vi of D-flat major, all sevenths (Ab7sus4 is a suspended dominant), a familiar move in R&B, soul and jazz. The chord changes once per bar, slower than rap (1.52) or the jazz sample «Mưa Đêm Jazz» (1.70). The same ii-V-I-vi shape appears in the city pop track «Đèn Neon Sài Gòn», the lo-fi track «Đêm mưa học bài» and that jazz sample, each in its own key and tempo.
How MuziAI builds this genre
The style description opens with R&B, smooth, soulful vocals, groovy bass, warm keys. Both samples add the Romantic mood, piano and 808 bass, then split on the voice: «Thầm Thương Em» (Secretly Loving You) has melismatic runs, rich harmonies and a female lead; «Mưa Làm Lành» (Rain That Mends) has call-and-response, ad-libs and a male-female duet.
MuziAI treats R&B as a voice-first genre. Yet a separate measurement on vocals isolated from songs on the site gives R&B a share of sustained notes of only 0.125-0.191, close to rap (0.114-0.190) and below pop (0.237-0.405). The AI-sung R&B here moves in shorter notes than the genre's reputation suggests.
Inside the samples
«Thầm Thương Em» opens with a 9-bar intro, then two rounds of a 16-bar verse into an 8-bar chorus, a 5-bar bridge and a closing 12-bar chorus, with no outro. The verses run twice as long as the chorus, so storytelling gets the room. The melody spans 17 semitones.
«Mưa Làm Lành» keeps the 9-bar intro but trims the verses to 12 bars, swaps the bridge for an 8-bar interlude and adds a 4-bar outro. Its melody is much wider at 24 semitones, though it has fewer notes (210 vs 251). That may be because the two voices share one melody line, but two songs cannot prove it.
Getting better results
- Stay at the Mid tempo to stay close to the samples; there is no Slow R&B sample to compare against yet.
- Write verses longer than the chorus: the samples pair 12- to 16-bar verses with 8-bar choruses.
- Want that exact ii-V-I-vi loop? Open «Thầm Thương Em» and use the button that sings new lyrics over its sheet music. MuziAI does not yet accept a typed chord loop.
- For a duet, pick the male-female duet voice plus call-and-response; the AI lyric writer then adds bracketed echo lines in the chorus so the voices answer each other.
- Treat vocal runs as a hint: technique tags are suggestions, not guarantees, and sheet music cannot record a run. Listen before you judge.
Limits
Only 2 samples, sharing key, tempo and loop, so we cannot tell whether the model always picks this frame for R&B or the match is chance. No solo male R&B and no English lyric yet. Sheet music cannot capture groove or vocal tone. Hear both in the song library, then make your own.
