{"observation":{"id":"130f872b-fe40-4848-bbb8-0068509c4f5d","tool":"elevenlabs","tool_name":"ElevenLabs","criterion":"voice-cloning-quality","criterion_name":"Voice Cloning Quality","criterion_definition":"Does the dubbed voice sound natural, and does it match the original speaker's energy, tone, and style?","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"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)","scenario":"hindi-vlog-style-talking-head-hindi-english","scenario_name":"Hindi vlog-style talking head (Hindi → English)","group_tag":"video-translation-voice-clone-lip-sync","scenario_description":"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.","modality":"video","input_text":null,"input_artifact_refs":[],"stresses":[],"verdict":"worked","score":null,"score_total":null,"note":"The Spanish dubbed voice was reported as excellent, clear, professional, and highly natural sounding, which fit the educational tone well.","evidence_state":"verified","source":"first-party","artifacts":[{"url":"https://d3epheqghktydj.cloudfront.net/elevenlabs-input-2-educational-es-dubbed.mp4","role":"output","alt":"ElevenLabs — Input 2 Educational_es_dubbed.mp4"}],"run_id":"9feca581-b454-4bda-a610-a646cd0092f0","study_title":"Translate Videos with Voice Cloning and Lip Sync Using AI","study_kind":"backfill","research_task":"86b96dfpf","tested_at":"2026-06-24T05:45:24.018000+00:00","completeness":"output-only","input":{"state":"not-captured","text":null,"files":[],"modality":"video","stresses":[]},"tool_page_slug":"elevenlabs","tool_url":"https://aidemos.com/tools/elevenlabs","permalink":"https://aidemos.com/evidence/130f872b-fe40-4848-bbb8-0068509c4f5d","api_url":"https://ai.aidemos.com/v1/observations/130f872b-fe40-4848-bbb8-0068509c4f5d"},"peers":[{"id":"be692751-8937-4f24-b417-17444353cf60","tool":"dubverse","tool_name":"Dubverse","verdict":"worked","score":null,"score_total":null,"note":"Produces a natural, professional-sounding voice that fits neutral educational narration.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/dubverse-input-2-educational.mp4","evidence_url":"https://aidemos.com/evidence/be692751-8937-4f24-b417-17444353cf60"},{"id":"ce503b73-2ecf-45f4-b807-c18269db157d","tool":"heygen","tool_name":"Heygen","verdict":"worked","score":null,"score_total":null,"note":"Generates a dubbed voice whose tone matches the original speaker's energetic fitness style.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/heygen-input-1-fitness-video-online-video-cutter-com.mp4","evidence_url":"https://aidemos.com/evidence/ce503b73-2ecf-45f4-b807-c18269db157d"},{"id":"5db79a49-a83d-41c0-9632-35eb8312e19e","tool":"rask-ai","tool_name":"Rask AI","verdict":"mixed","score":null,"score_total":null,"note":"Generates a generally natural Hindi dubbed voice, but some passages sound slightly robotic and do not fully capture the speaker's fitness energy or emotion.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/rask-ai-input-1-fitness-video-online-video-cutter-com.mp4","evidence_url":"https://aidemos.com/evidence/5db79a49-a83d-41c0-9632-35eb8312e19e"},{"id":"9b180883-0490-490d-873e-65b64726755c","tool":"sync-labs","tool_name":"Sync Labs","verdict":"mixed","score":null,"score_total":null,"note":"The dubbed voice is decent but still sounds AI-like and less natural than ElevenLabs, so the speaker match is only moderate.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/sync-labs-input-2-educational.mp4","evidence_url":"https://aidemos.com/evidence/9b180883-0490-490d-873e-65b64726755c"},{"id":"c32e56fb-f126-4c48-ae4f-6fa64b280f18","tool":"synthesia","tool_name":"Synthesia","verdict":"mixed","score":null,"score_total":null,"note":"The 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.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/synthesia-input-2-educational.mp4","evidence_url":"https://aidemos.com/evidence/c32e56fb-f126-4c48-ae4f-6fa64b280f18"}],"other_criteria":[{"id":"5c688257-87af-4ea3-899a-90663fd944e1","criterion":"lip-sync-accuracy","criterion_name":"Lip Sync Accuracy","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"Does not provide built-in lip sync, so the Spanish dub is not visually matched to the speaker’s mouth movements.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/5c688257-87af-4ea3-899a-90663fd944e1"},{"id":"19111e13-9d4e-4f30-8535-be7a2d3b92c9","criterion":"lip-sync-accuracy","criterion_name":"Lip Sync Accuracy","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"No lip-sync feature was provided, so the dubbing could not automatically match the original Hindi mouth movements.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/19111e13-9d4e-4f30-8535-be7a2d3b92c9"},{"id":"d3cdcec4-eba0-4bd3-a162-9fe73d634781","criterion":"lip-sync-accuracy","criterion_name":"Lip Sync Accuracy","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"Provides no built-in lip sync or video integration, so the dubbed audio cannot visually align with the original mouth movements inside the tool.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/d3cdcec4-eba0-4bd3-a162-9fe73d634781"},{"id":"3e83cf70-bba6-4c72-b5cd-598f82563082","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Supports audio export in the free plan, but with limits; higher quality and longer usage require paid access.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/3e83cf70-bba6-4c72-b5cd-598f82563082"},{"id":"52295852-5bc7-4589-acd2-e6e1654cf14c","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"failed","score":null,"score_total":null,"note":"The exported dub is not fully production-ready because the last part of the audio is missing.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/52295852-5bc7-4589-acd2-e6e1654cf14c"},{"id":"19241cf7-6caf-4289-89a4-004445a2503a","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Audio export is available but limited, so the result is downloadable yet not positioned as a fully unrestricted production export.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/19241cf7-6caf-4289-89a4-004445a2503a"},{"id":"651871fc-1329-4107-8021-c2508319809f","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Audio export was supported, but the free plan imposed limitations, so the output was exportable yet not fully unrestricted or production-ready by itself.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/651871fc-1329-4107-8021-c2508319809f"},{"id":"9fff1c1c-ee8b-4bf1-85e2-80345847c3eb","criterion":"output-quality-export","criterion_name":"Output Quality & Export","rank_role":"context","verdict":"mixed","score":null,"score_total":null,"note":"Audio export was available, but only with limits, so the export path existed without being fully open-ended or production-grade on the free plan.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/9fff1c1c-ee8b-4bf1-85e2-80345847c3eb"},{"id":"f8dc7c1a-4373-4541-a29a-bb4a853895db","criterion":"translation-accuracy","criterion_name":"Translation Accuracy","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Produces an accurate Hindi translation of the English fitness narration, preserving the intended meaning well enough for instructions.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/f8dc7c1a-4373-4541-a29a-bb4a853895db"}],"appears_in":[{"page_type":"ranking","slug":"ai-video-dubbing-tools","title":"Best AI Tools to Translate Videos with Voice Cloning and Lip Sync","url":"https://aidemos.com/best/ai-video-dubbing-tools","binding":"run"}],"same_scenario":[{"id":"be692751-8937-4f24-b417-17444353cf60","tool":"dubverse","tool_name":"Dubverse","verdict":"worked","score":null,"score_total":null,"note":"Produces a natural, professional-sounding voice that fits neutral educational narration."},{"id":"ce503b73-2ecf-45f4-b807-c18269db157d","tool":"heygen","tool_name":"Heygen","verdict":"worked","score":null,"score_total":null,"note":"Generates a dubbed voice whose tone matches the original speaker's energetic fitness style."},{"id":"5db79a49-a83d-41c0-9632-35eb8312e19e","tool":"rask-ai","tool_name":"Rask AI","verdict":"mixed","score":null,"score_total":null,"note":"Generates a generally natural Hindi dubbed voice, but some passages sound slightly robotic and do not fully capture the speaker's fitness energy or emotion."},{"id":"9b180883-0490-490d-873e-65b64726755c","tool":"sync-labs","tool_name":"Sync Labs","verdict":"mixed","score":null,"score_total":null,"note":"The dubbed voice is decent but still sounds AI-like and less natural than ElevenLabs, so the speaker match is only moderate."},{"id":"c32e56fb-f126-4c48-ae4f-6fa64b280f18","tool":"synthesia","tool_name":"Synthesia","verdict":"mixed","score":null,"score_total":null,"note":"The 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."}]}