The generated Hindi voice was clear and natural, but the output used an AI avatar instead of the original person, so it did not preserve the source speaker’s identity or style.
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
Synthesia — Input 1 Fitness Video (online-video-cutter.com).mp4
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
No output artifact
The verdict rests on the tester's written observation alone — no file was captured for this cell.
Also checked on this input — same tool, 6 other criteria
Output Quality & Export✗ FailedExport was limited to paid access, so the final result was not freely downloadable as a clean, unrestricted export.Output Quality & Export✗ FailedExport was restricted without a paid plan, so the final video is not freely downloadable in a production-ready way on this test.Output Quality & Export✗ FailedAlthough the avatar output was described as professional-looking, export was restricted to the paid plan or limited trial and there was no reliable free download.Translation Accuracy✓ WorkedThe Hindi translation preserved the source meaning accurately for the fitness short.Translation Accuracy◐ MixedThe English translation was semantically accurate, but the output shifted the casual vlog register toward a slightly more formal tone.Translation Accuracy✓ WorkedThe Spanish output was reported as accurate and well-structured, showing that the tool can preserve educational content clearly during translation.
Provenance
- Observation
- e219f2da-9cfd-4b35-af38-9f5e8628329a
- 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
- input 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: "synthesia",
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
Dubverse✓ WorkedProduces a natural, professional-sounding voice that fits neutral educational narration.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⚠ StruggledThe dubbed voice sounded generic and lacked personality, so the voice cloning was not convincing for a conversational vlog.
This evidence is published in
Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com