post: generating subtitles for songs that ship without timestamps

Tutorial on turning untimed AI-generated audio into LRC + SRT: align ASR word
timestamps against the KNOWN lyrics (SequenceMatcher) instead of trusting a
transcript, then a governor that rejects impossible anchors, refills runs by
unit-proportional duration, and enforces a 1.2 s minimum line gap.

Ships 18 English songs (342 subtitle lines, mean anchor coverage 0.96, 9/18
fully anchored) with synced lyrics plus downloadable .srt per track. Documents
both player bugs and the headless-Chrome numeric probe that finally caught them.

public/subs/the-puppeteer-s-thread.srt

@@ -0,0 +1,75 @@
+1
+00:00:24,120 --> 00:00:31,039
+Carved from a willow branch, painted with a smile
+
+2
+00:00:34,160 --> 00:00:42,439
+Dressed in tiny embroidered silk, traveling mile by mile
+
+3
+00:00:46,000 --> 00:00:51,719
+Ten thin threads of crimson silk tied upon my hands
+
+4
+00:00:55,500 --> 00:01:02,259
+Dancing in the market square across the distant lands
+
+5
+00:01:07,799 --> 00:01:13,120
+Crowds will gather when the gong begins to softly ring
+
+6
+00:01:13,120 --> 00:01:18,760
+Laughing at the little doll that cannot speak or sing
+
+7
+00:01:21,659 --> 00:01:26,700
+Dance in the lantern light, spin around the stage
+
+8
+00:01:26,700 --> 00:01:32,420
+Telling all the legends of a long-forgotten age
+
+9
+00:01:32,420 --> 00:01:37,659
+Though my heart is made of wood and cannot feel the rain
+
+10
+00:01:37,659 --> 00:01:44,420
+Every pull upon the thread remembers joy and pain
+
+11
+00:02:10,679 --> 00:02:15,819
+Autumn leaves are falling down upon the empty street
+
+12
+00:02:15,819 --> 00:02:21,360
+Only echoes remain of the applause so sweet
+
+13
+00:02:21,360 --> 00:02:26,979
+Keep me in the wooden box beside your warm fireplace
+
+14
+00:02:26,979 --> 00:02:35,219
+Even when the paint fades off my little smiling face
+
+15
+00:02:36,740 --> 00:02:42,860
+Dance in the lantern light, spin around the stage
+
+16
+00:02:42,860 --> 00:02:48,560
+Telling all the legends of a long-forgotten age
+
+17
+00:02:48,560 --> 00:02:54,020
+Though my heart is made of wood and cannot feel the rain
+
+18
+00:02:54,020 --> 00:03:01,060
+Every pull upon the thread remembers joy and pain
+
+19
+00:03:05,039 --> 00:03:07,719
+Ten thin threads of crimson silk...