The dubbed voice sounds less natural and slightly robotic, and it does not preserve the speaker's emotion or personality well.
What was measured
Voice Cloning Quality
Does the dubbed voice sound natural, and does it match the original speaker's energy, tone, and style?
decisive for this rankingtransformation
The product here depends on the dubbed voice sounding natural and resembling the original speaker, so weak voice cloning directly hurts the core task. (3 of 3 judges)
What was given, what came back
Test input: Hindi vlog-style talking head (Hindi → English) · video · group: video-translation-voice-clone-lip-sync
Input — what we sent
Input not captured
This run recorded no prompt or input file for the test, so we cannot show you what produced the result below. Capture gaps are tracked, not hidden.
A casual Hindi/Hinglish talking-head or vlog-style creator video translated into English to stress informal language handling, slang, and natural-sounding voice cloning on real creator content.
Output — unretouched
Dubverse — English-syncvideo 1.mp4.mp4
Also checked on this input — same tool, 11 other criteria
Input Handling✓ WorkedHandles structured educational speech very well, with high transcription accuracy on clear narration and no duration-related issues.Input Handling✓ WorkedAccepts direct MP4 video upload, auto-detects clear English speech accurately, and handles single-speaker footage reliably.Input Handling◐ MixedAccepts casual Hindi speech, but transcription degrades on slang, mixed-language speech, background noise, and weak speaker separation.Lip Sync Accuracy✓ WorkedLip sync is good for slow to medium speech.Lip Sync Accuracy◐ MixedLip sync is good on slow to medium speech, but fast instruction segments show a slight delay.Lip Sync Accuracy✗ FailedLip sync is the weakest of the tested inputs, with noticeable audio-video mismatch in fast speech parts.Lip Sync Accuracy✓ WorkedAchieves more precise lip sync than the other tested inputs.Translation Accuracy✓ WorkedProduces highly accurate English-to-Spanish translation that preserves technical and educational meaning.Translation Accuracy◐ MixedSome fitness-specific terms are not localized naturally, so terminology quality is not fully consistent.Translation Accuracy◐ MixedBasic Hindi-to-English translation remains understandable and preserves overall meaning, but struggles with slang and informal tone.Translation Accuracy✓ WorkedPreserves common fitness terminology accurately when dubbing English to Hindi.
Provenance
- Observation
- 77a4bb1d-c755-4304-9beb-ba18e6ba59c9
- Evidence run
- 9feca581-b454-4bda-a610-a646cd0092f0
- Study
- Translate Videos with Voice Cloning and Lip Sync Using AI
- Research task
- 86b96dfpf
- Tested at
- Jun 24, 2026
- Source
- first-party
- Evidence state
- verified
- Proof shown
- output only
- Cost / latency
- not captured
- Repeat run
- not captured
- Tester
- not captured
The last three rows are honest blanks, not placeholders — our capture has no field for them yet.
Query this
get_evidence({
tool: "dubverse",
scenario: "video-translation-voice-clone-lip-sync"
})MCP · mcp.aidemos.com/api/mcp
Free with attribution.
Same input, same check — 5 other tools
measured on Voice Cloning Quality
ElevenLabs✓ WorkedThe dubbed voice was reported as very high quality: natural, human-like, expressive, and especially strong for energetic fitness instruction delivery.Heygen◐ MixedThe dubbed voice sounds slightly robotic rather than fully natural.Rask AI◐ MixedCreates a clear English dubbed voice, but it does not fully match the original speaker's personality and can feel generic.Sync Labs◐ MixedThe dubbed voice is decent but still sounds AI-like and less natural than ElevenLabs, so the speaker match is only moderate.Synthesia◐ MixedThe Spanish voice sounded natural and professional, but the report frames the workflow as avatar-based rather than source-speaker-based, so it does not demonstrate true original-speaker voice cloning.
This evidence is published in
Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com