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/green-train-to-the-sea.srt

@@ -0,0 +1,67 @@
+1
+00:00:28,220 --> 00:00:29,980
+Clickety-clack upon the track, the green train starts to roll
+
+2
+00:00:29,420 --> 00:00:30,620
+Leaving all the city gray behind the tunnel hole
+
+3
+00:00:30,620 --> 00:00:31,820
+Forehead pressed against the glass, I watch the fields go by
+
+4
+00:00:31,820 --> 00:00:33,020
+Golden wheat and windmills waving underneath the sky
+
+5
+00:00:33,020 --> 00:00:34,220
+Take me where the spring wind blows across the open blue
+
+6
+00:00:34,220 --> 00:00:38,359
+Ten miles of wildflowers blooming just for me and you
+
+7
+00:00:38,359 --> 00:00:42,679
+Every station has a name I've never heard before
+
+8
+00:00:42,679 --> 00:00:47,600
+Soon the scent of salty air will meet us at the shore
+
+9
+00:00:57,620 --> 00:01:01,479
+Strangers sharing oranges and stories in the seat
+
+10
+00:01:01,920 --> 00:01:06,680
+Sunlight dancing in the aisle around my dangling feet
+
+11
+00:01:06,680 --> 00:01:11,500
+Postcards in my backpack waiting for a stamp and pen
+
+12
+00:01:11,500 --> 00:01:16,239
+To tell the people back at home I'm coming back again
+
+13
+00:01:16,239 --> 00:01:21,140
+Take me where the spring wind blows across the open blue
+
+14
+00:01:21,140 --> 00:01:26,340
+Ten miles of wildflowers blooming just for me and you
+
+15
+00:01:26,340 --> 00:01:30,659
+Every station has a name I've never heard before
+
+16
+00:01:30,659 --> 00:01:35,599
+Soon the scent of salty air will meet us at the shore
+
+17
+00:01:46,820 --> 00:01:48,359
+Look, there is the sea...