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/sanctuary-of-the-dawn.srt

@@ -0,0 +1,75 @@
+1
+00:00:22,822 --> 00:00:25,640
+Ahh-ahh, sanctus, ahh...
+
+2
+00:00:25,640 --> 00:00:31,739
+Shadows fade before the light that rises in the east
+
+3
+00:00:31,739 --> 00:00:37,759
+Every troubled storm is stilled and every sorrow ceased
+
+4
+00:00:37,759 --> 00:00:44,119
+Through the tall stained-glass windows morning beams descend
+
+5
+00:00:44,119 --> 00:00:50,560
+Shining on a quiet road where broken hearts can mend
+
+6
+00:00:50,560 --> 00:00:58,740
+Peace be with you, weary soul, lay your burden down
+
+7
+00:00:58,740 --> 00:01:05,079
+Where the silver rivers flow beyond the sleeping town
+
+8
+00:01:05,079 --> 00:01:11,459
+Lift your eyes unto the hills where golden angels sing
+
+9
+00:01:11,459 --> 00:01:18,579
+Rest beneath the gentle shelter of a shining wing
+
+10
+00:01:21,159 --> 00:01:27,180
+Like a bell across the valley ringing clear and true
+
+11
+00:01:27,180 --> 00:01:33,439
+Every dawn is bringing back a promise made anew
+
+12
+00:01:34,180 --> 00:01:40,060
+Walk into the quiet light and leave the dark behind
+
+13
+00:01:40,060 --> 00:01:46,439
+There is grace in every breath for all of humankind
+
+14
+00:01:48,400 --> 00:01:54,640
+Peace be with you, weary soul, lay your burden down
+
+15
+00:01:54,640 --> 00:02:01,019
+Where the silver rivers flow beyond the sleeping town
+
+16
+00:02:01,019 --> 00:02:07,480
+Lift your eyes unto the hills where golden angels sing
+
+17
+00:02:07,480 --> 00:02:15,300
+Rest beneath the gentle shelter of a shining wing
+
+18
+00:02:15,300 --> 00:02:25,520
+Peace be with you... forevermore.
+
+19
+00:02:26,479 --> 00:02:27,879
+Amen, ahh...