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/lanterns-on-the-lotus-pond.srt

@@ -0,0 +1,75 @@
+1
+00:00:10,691 --> 00:00:15,291
+Patter goes the summer rain upon the lotus leaf
+
+2
+00:00:15,291 --> 00:00:19,891
+Washing all the dusty world and bringing cool relief
+
+3
+00:00:19,891 --> 00:00:24,491
+Stepping on the wet bluestone beside the willow bridge
+
+4
+00:00:24,491 --> 00:00:28,579
+Dragonflies are resting on the painted wooden ridge
+
+5
+00:00:28,579 --> 00:00:31,899
+Fold a little paper boat and light a candlewick
+
+6
+00:00:33,159 --> 00:00:37,840
+Make a wish before the current carries it so quick
+
+7
+00:00:40,460 --> 00:00:44,840
+Floating down the lotus pond, a hundred lanterns glow
+
+8
+00:00:46,380 --> 00:00:49,619
+Mirrored in the ripples where the silver fishes go
+
+9
+00:00:49,619 --> 00:00:54,219
+Listen to the bamboo flute across the misty stream
+
+10
+00:00:54,219 --> 00:01:00,460
+In the courtyard of the moon, we share a summer dream
+
+11
+00:01:03,960 --> 00:01:08,719
+Silk fan in my little hand to chase the fireflies
+
+12
+00:01:08,719 --> 00:01:13,359
+Red string braided in my hair beneath the lantern skies
+
+13
+00:01:13,359 --> 00:01:18,219
+Grandma tells a fairy tale of rabbits in the moon
+
+14
+00:01:18,219 --> 00:01:22,959
+While the sweet osmanthus flowers blossom in the June
+
+15
+00:01:25,539 --> 00:01:30,019
+Floating down the lotus pond, a hundred lanterns glow
+
+16
+00:01:30,019 --> 00:01:34,620
+Mirrored in the ripples where the silver fishes go
+
+17
+00:01:34,620 --> 00:01:39,359
+Listen to the bamboo flute across the misty stream
+
+18
+00:01:39,359 --> 00:01:45,359
+In the courtyard of the moon, we share a summer dream
+
+19
+00:02:06,760 --> 00:02:09,360
+Red lanterns drifting far away...