{"schema":"record/v1","id":"art_01M5MT8J0X4DCAJAN9335PNCX6","type":"article","revision":1,"etag":"\"r1.s0\"","title":"How do I turn a hit point (a timecode I must land on) into a tempo and a click, and how close does the landing need to be?","summary":"Tempo times beats equals seconds: the editor (S3) and the Phaedrus Audio page (S12) both reduce hit placement to arithmetic, and S12 gives a worked click-book example in which 80 BPM misses a hit at 34 s by a quarter or half second but 81.13 BPM (17-6 frames per beat at 24 fps) lands it. S12 states a sync tolerance of two film frames (about 41 ms) with a rule of thumb of 0.1 s. A composer (S7) finds a rough tempo by tapping, then uses a software Find Tempo search over a tempo range. The arithmetic in S12 was re-checked by a batch-local script (consistent within rounding).","status":"active","body":{"text":"Tempo times beats equals seconds: the editor (S3) and the Phaedrus Audio page (S12) both reduce hit placement to arithmetic, and S12 gives a worked click-book example in which 80 BPM misses a hit at 34 s by a quarter or half second but 81.13 BPM (17-6 frames per beat at 24 fps) lands it. S12 states a sync tolerance of two film frames (about 41 ms) with a rule of thumb of 0.1 s. A composer (S7) finds a rough tempo by tapping, then uses a software Find Tempo search over a tempo range. The arithmetic in S12 was re-checked by a batch-local script (consistent within rounding).\n\nCurator qualifications: Curator arithmetic: 60/81.13 x 24 = 17.75 frames per beat (click-book 17-6, i.e. 17 and 6/8 frames); 46 beats after beat 1 = 34.02 s, matching the source's '47th beat ... 34.03 seconds'; at 80 BPM, 34 s = 45.33 beats, a miss of about 0.25 s. Correction: the source states '≤2 film frames or ± 41mS', i.e. ±1 frame at 24 fps (a 2-frame window), not 'two frames (about 41 ms)'. The source also mislabels the click value as '17-6 frames/second' (it is frames per beat). Tolerance is ±41 ms (±1 frame at 24 fps; a 2-frame window), per the source wording. Note the source's 'frames/second' label means frames per beat.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://simpsonsmusic500.wordpress.com/2011/08/09/music-editing-101-breakdown-notes/","note":"hit/sync; click-book example"},{"url":"https://simpsonsmusic500.wordpress.com/2011/08/22/music-editing-101-the-scoring-session-2/","note":"hit/sync; click-book example"},{"url":"https://www.phaedrus-audio.com/music_2_picture.htm","note":"hit/sync; click-book example"},{"url":"https://www.artofcomposing.com/how-to-spot-a-film","note":"hit/sync; click-book example"}]},"categories":["T10","T14"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://simpsonsmusic500.wordpress.com/2011/08/09/music-editing-101-breakdown-notes/","claim":"Tempo times beats equals seconds: the editor (S3) and the Phaedrus Audio page (S12) both reduce hit placement to arithmetic, and S12 gives a worked click-book example in which 80 BPM misses a hit at 34 s by a quarter or half second but 81.13 BPM (17-6 frames per beat at 24 fps) lands it. S12 states a sync tolerance of two film frames (about 41 ms) with a rule of thumb of 0.1 s. A composer (S7) finds a rough tempo by tapping, then uses a software Find Tempo search over a tempo range. The arithmetic in S12 was re-checked by a batch-local script (consistent within rounding).","locator":"hit/sync; click-book example","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-d99eb3ab21891e961cba4fc5ac4b3ce4d988d465/record.json#p-d99eb3ab21891e961cba4fc5ac4b3ce4d988d465/record","import_batch_id":"pipe-35e93979da18a1c6d9b6fe1477d04dfc30d0dfa3","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-35e93979da18a1c6d9b6fe1477d04dfc30d0dfa3","original":{"body":{"text":"Tempo times beats equals seconds: the editor (S3) and the Phaedrus Audio page (S12) both reduce hit placement to arithmetic, and S12 gives a worked click-book example in which 80 BPM misses a hit at 34 s by a quarter or half second but 81.13 BPM (17-6 frames per beat at 24 fps) lands it. S12 states a sync tolerance of two film frames (about 41 ms) with a rule of thumb of 0.1 s. A composer (S7) finds a rough tempo by tapping, then uses a software Find Tempo search over a tempo range. The arithmetic in S12 was re-checked by a batch-local script (consistent within rounding).\n\nCurator qualifications: Curator arithmetic: 60/81.13 x 24 = 17.75 frames per beat (click-book 17-6, i.e. 17 and 6/8 frames); 46 beats after beat 1 = 34.02 s, matching the source's '47th beat ... 34.03 seconds'; at 80 BPM, 34 s = 45.33 beats, a miss of about 0.25 s. Correction: the source states '≤2 film frames or ± 41mS', i.e. ±1 frame at 24 fps (a 2-frame window), not 'two frames (about 41 ms)'. The source also mislabels the click value as '17-6 frames/second' (it is frames per beat). Tolerance is ±41 ms (±1 frame at 24 fps; a 2-frame window), per the source wording. Note the source's 'frames/second' label means frames per beat.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://simpsonsmusic500.wordpress.com/2011/08/09/music-editing-101-breakdown-notes/","note":"hit/sync; click-book example"},{"url":"https://simpsonsmusic500.wordpress.com/2011/08/22/music-editing-101-the-scoring-session-2/","note":"hit/sync; click-book example"},{"url":"https://www.phaedrus-audio.com/music_2_picture.htm","note":"hit/sync; click-book example"},{"url":"https://www.artofcomposing.com/how-to-spot-a-film","note":"hit/sync; click-book example"}]},"tags":[],"type":"article","links":[],"title":"How do I turn a hit point (a timecode I must land on) into a tempo and a click, and how close does the landing need to be?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Tempo times beats equals seconds: the editor (S3) and the Phaedrus Audio page (S12) both reduce hit placement to arithmetic, and S12 gives a worked click-book example in which 80 BPM misses a hit at 34 s by a quarter or half second but 81.13 BPM (17-6 frames per beat at 24 fps) lands it. S12 states a sync tolerance of two film frames (about 41 ms) with a rule of thumb of 0.1 s. A composer (S7) finds a rough tempo by tapping, then uses a software Find Tempo search over a tempo range. The arithmetic in S12 was re-checked by a batch-local script (consistent within rounding).","evidence":{"claims":[{"url":"https://simpsonsmusic500.wordpress.com/2011/08/09/music-editing-101-breakdown-notes/","claim":"Tempo times beats equals seconds: the editor (S3) and the Phaedrus Audio page (S12) both reduce hit placement to arithmetic, and S12 gives a worked click-book example in which 80 BPM misses a hit at 34 s by a quarter or half second but 81.13 BPM (17-6 frames per beat at 24 fps) lands it. S12 states a sync tolerance of two film frames (about 41 ms) with a rule of thumb of 0.1 s. A composer (S7) finds a rough tempo by tapping, then uses a software Find Tempo search over a tempo range. The arithmetic in S12 was re-checked by a batch-local script (consistent within rounding).","locator":"hit/sync; click-book example","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T10","T14"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":1,"topic_ids":[],"confidence":"Not stated; see limitations.","limitations":["Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. 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