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/clockwork-starlight.srt

@@ -0,0 +1,83 @@
+1
+00:00:19,300 --> 00:00:23,440
+Ticking in the quiet tower made of porcelain and glass
+
+2
+00:00:23,440 --> 00:00:28,600
+I can see the painted clouds and paper swallows pass
+
+3
+00:00:32,359 --> 00:00:36,719
+Every gear is turning slow beneath the velvet sky
+
+4
+00:00:36,719 --> 00:00:42,200
+Counting all the shooting stars that never say goodbye
+
+5
+00:00:46,119 --> 00:00:49,579
+Someone left a silver key beside the windowpane
+
+6
+00:00:50,520 --> 00:00:56,719
+Unlocking all the memories hidden in the rain
+
+7
+00:00:59,859 --> 00:01:04,659
+Sing for the dawn across the endless night
+
+8
+00:01:04,659 --> 00:01:09,200
+Spinning the threads of shadow into light
+
+9
+00:01:09,200 --> 00:01:13,700
+Even if the clock should stop and time fades away
+
+10
+00:01:13,700 --> 00:01:20,459
+I will keep this little wish until the break of day
+
+11
+00:01:22,280 --> 00:01:30,000
+La-la-lu-la, hear the distant bell
+
+12
+00:01:31,340 --> 00:01:34,540
+Breaking the silent spell
+
+13
+00:01:38,140 --> 00:01:42,500
+Pages of an ancient book are fluttering like wings
+
+14
+00:01:42,500 --> 00:01:48,400
+Telling me of emerald seas and forgotten kings
+
+15
+00:01:52,160 --> 00:01:56,379
+With my small and trembling hands I open up the door
+
+16
+00:01:56,379 --> 00:02:01,980
+Stepping out into a world I've never seen before
+
+17
+00:02:05,700 --> 00:02:09,360
+Sing for the dawn across the endless night
+
+18
+00:02:10,560 --> 00:02:15,020
+Spinning the threads of shadow into light
+
+19
+00:02:15,020 --> 00:02:19,560
+Even if the clock should stop and time fades away
+
+20
+00:02:21,120 --> 00:02:27,360
+I will keep this little wish until the break of day
+
+21
+00:02:33,639 --> 00:02:36,740
+Until the break of day...