{"observation":{"id":"cb8e11d2-6950-46e7-8aa2-4c9ee407e2e1","tool":"cartesia-ai","tool_name":"Cartesia.ai","criterion":"emotional-delivery","criterion_name":"Emotional Delivery","criterion_definition":"Appropriate expression for the script; matches the tone and emotion of the narration.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"Matching the script’s tone and emotion is part of what makes the voiceover professionally usable. (3 of 3 judges)","scenario":"educational-explainer","scenario_name":"Educational Explainer","group_tag":"voiceover-narration","scenario_description":"An educational narration explaining why the sky changes color during sunset, intended to test clarity, scientific pronunciation, and calm long-form explanation.","modality":"text","input_text":"Have you ever wondered why the sky changes color during sunset? It all comes down to the way sunlight travels through Earth's atmosphere. During the day, blue light is scattered in every direction, making the sky appear blue. But as the sun gets lower, its light travels through much more of the atmosphere. Most of the blue light gets scattered away, leaving behind the warmer reds, oranges, and pinks that create those beautiful evening skies we love to watch.","input_artifact_refs":[],"stresses":["Clarity of informational narration","Pronunciation of scientific terms","Calm and engaging delivery","Pacing consistency","Voice quality during long-form explanation"],"verdict":"mixed","score":null,"score_total":null,"note":"Delivers a pleasant but somewhat limited emotional range, and the lack of vocal variation makes longer passages feel slightly flat.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://d3epheqghktydj.cloudfront.net/cartesia-ai-cartesia-educational-explainer-output-5465e0bd9b7a.wav","role":"output","alt":null}],"run_id":"2cc0c2ec-33ac-4420-b0c5-85214fa9e409","study_title":"Generate Professional Voiceovers","study_kind":"generation","research_task":"86baq76ud","tested_at":null,"completeness":"input-and-output","input":{"state":"text","text":"Have you ever wondered why the sky changes color during sunset? It all comes down to the way sunlight travels through Earth's atmosphere. During the day, blue light is scattered in every direction, making the sky appear blue. But as the sun gets lower, its light travels through much more of the atmosphere. Most of the blue light gets scattered away, leaving behind the warmer reds, oranges, and pinks that create those beautiful evening skies we love to watch.","files":[],"modality":"text","stresses":["Clarity of informational narration","Pronunciation of scientific terms","Calm and engaging delivery","Pacing consistency","Voice quality during long-form explanation"]},"tool_page_slug":"cartesia-ai","tool_url":"https://aidemos.com/tools/cartesia-ai","permalink":"https://aidemos.com/evidence/cb8e11d2-6950-46e7-8aa2-4c9ee407e2e1","api_url":"https://ai.aidemos.com/v1/observations/cb8e11d2-6950-46e7-8aa2-4c9ee407e2e1"},"peers":[{"id":"4056413d-d264-4bf6-adb3-fb2f161d0845","tool":"epidemic-sound-voices","tool_name":"Epidemic Sound Voices","verdict":"worked","score":null,"score_total":null,"note":"Uses a calm, balanced emotional tone that fits educational narration well, presenting information clearly without sounding overly dramatic or artificial.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/epidemic-sound-epidemic-sound-educational-explainer-out-82428c134ec6.wav","evidence_url":"https://aidemos.com/evidence/4056413d-d264-4bf6-adb3-fb2f161d0845"},{"id":"a97059f7-2cae-4f1a-b6f7-78162e787069","tool":"minimax","tool_name":"Minimax","verdict":"worked","score":null,"score_total":null,"note":"Stays calm, informative, and balanced rather than overly expressive, matching the tone expected from educational explainers.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/minimax-io-minimax-educational-explainer-output-e4de825b86df.wav","evidence_url":"https://aidemos.com/evidence/a97059f7-2cae-4f1a-b6f7-78162e787069"},{"id":"970ffc72-b892-41fc-80a4-39eef87cfbaf","tool":"murf-ai","tool_name":"Murf AI","verdict":"failed","score":null,"score_total":null,"note":"The default narration is almost completely emotionless, creating a robotic listening experience that can make the explainer feel monotonous over time.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/murf-ai-murf-ai-educational-explainer-output-ecec3d709ef1.wav","evidence_url":"https://aidemos.com/evidence/970ffc72-b892-41fc-80a4-39eef87cfbaf"},{"id":"dab10ea6-d19a-40a9-aeca-9442cecf011e","tool":"noiz-ai","tool_name":"Noiz AI","verdict":"mixed","score":null,"score_total":null,"note":"Generally matches the calm explanatory tone, but the delivery lacks subtle variation and becomes less engaging over longer passages.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/noiz-ai-noiz-ai-educational-explainer-output-bb492dfa14aa.wav","evidence_url":"https://aidemos.com/evidence/dab10ea6-d19a-40a9-aeca-9442cecf011e"}],"other_criteria":[{"id":"8c9d82da-a142-4635-943b-bc76e2e58e18","criterion":"naturalness","criterion_name":"Naturalness","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Produces narration that sounds mostly natural and conversational, with a smooth flow that stays engaging rather than artificial.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/8c9d82da-a142-4635-943b-bc76e2e58e18"},{"id":"2dc0e5f2-69f4-445d-81f7-6c074b26a8dd","criterion":"pacing-rhythm","criterion_name":"Pacing & Rhythm","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Keeps a smooth, steady, and consistent pace that supports comprehension without feeling rushed.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/2dc0e5f2-69f4-445d-81f7-6c074b26a8dd"},{"id":"dfea13ee-4a18-40c2-bac3-dd47a6170d09","criterion":"pronunciation-accuracy","criterion_name":"Pronunciation Accuracy","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Maintains clear, accurate articulation across both technical and general words, keeping the explanation easy to understand.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/dfea13ee-4a18-40c2-bac3-dd47a6170d09"},{"id":"c893bfcb-b137-416b-8bb9-25f589310613","criterion":"voice-quality","criterion_name":"Voice Quality","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Delivers clean, crisp audio with minimal artifacts, at a quality the report describes as professional for educational uses.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/c893bfcb-b137-416b-8bb9-25f589310613"}],"appears_in":[{"page_type":"ranking","slug":"ai-voiceover-tools","title":"Best AI Tools for Professional Voiceovers","url":"https://aidemos.com/best/ai-voiceover-tools","binding":"run"},{"page_type":"tool","slug":"cartesia-ai","title":null,"url":"https://aidemos.com/tools/cartesia-ai","binding":"run"},{"page_type":"tool","slug":"epidemic-sound","title":null,"url":"https://aidemos.com/tools/epidemic-sound","binding":"run"},{"page_type":"tool","slug":"minimax-io","title":null,"url":"https://aidemos.com/tools/minimax-io","binding":"run"},{"page_type":"tool","slug":"murf-ai","title":null,"url":"https://aidemos.com/tools/murf-ai","binding":"run"},{"page_type":"tool","slug":"noiz-ai","title":null,"url":"https://aidemos.com/tools/noiz-ai","binding":"run"}],"same_scenario":[{"id":"4056413d-d264-4bf6-adb3-fb2f161d0845","tool":"epidemic-sound-voices","tool_name":"Epidemic Sound Voices","verdict":"worked","score":null,"score_total":null,"note":"Uses a calm, balanced emotional tone that fits educational narration well, presenting information clearly without sounding overly dramatic or artificial."},{"id":"a97059f7-2cae-4f1a-b6f7-78162e787069","tool":"minimax","tool_name":"Minimax","verdict":"worked","score":null,"score_total":null,"note":"Stays calm, informative, and balanced rather than overly expressive, matching the tone expected from educational explainers."},{"id":"970ffc72-b892-41fc-80a4-39eef87cfbaf","tool":"murf-ai","tool_name":"Murf AI","verdict":"failed","score":null,"score_total":null,"note":"The default narration is almost completely emotionless, creating a robotic listening experience that can make the explainer feel monotonous over time."},{"id":"dab10ea6-d19a-40a9-aeca-9442cecf011e","tool":"noiz-ai","tool_name":"Noiz AI","verdict":"mixed","score":null,"score_total":null,"note":"Generally matches the calm explanatory tone, but the delivery lacks subtle variation and becomes less engaging over longer passages."}]}