No 4 GB attachment exists in Messages. All 6,594 attachment rows in chat.db were scanned. The largest item in the entire history is 776 MB.
Your message from 2026-08-17 at 23:47 names the file:
Went there today to get the full frequenxy 4GB file to mix
That file never travelled through Messages. You carried it back from the studio, and it landed on disk 72 minutes before you sent that text.
~/Music/Band-Practice/band-practice-8-14-26.wav
| Property | Value |
|---|---|
| Size | 3,584,105,324 bytes (3.58 GB) |
| Format | PCM 24-bit / 44.1 kHz stereo |
| Length | 3:45:27.76 |
| Saved | Aug 17, 22:35 |
| Integrity | Full decode, zero errors |
Ten equal segments cut at 1352.7757 seconds each, stream-copied so the PCM samples are untouched. Elapsed build time was 4.1 seconds.
| # | File | Start | End | Length | Size | Decode |
|---|---|---|---|---|---|---|
| 1 | part-00.wav | 0:00:00 | 0:22:32 | 22:32.79 | 341M | pass |
| 2 | part-01.wav | 0:22:32 | 0:45:05 | 22:32.79 | 341M | pass |
| 3 | part-02.wav | 0:45:05 | 1:07:38 | 22:32.79 | 341M | pass |
| 4 | part-03.wav | 1:07:38 | 1:30:11 | 22:32.79 | 341M | pass |
| 5 | part-04.wav | 1:30:11 | 1:52:43 | 22:32.70 | 341M | pass |
| 6 | part-05.wav | 1:52:43 | 2:15:16 | 22:32.79 | 341M | pass |
| 7 | part-06.wav | 2:15:16 | 2:37:49 | 22:32.79 | 341M | pass |
| 8 | part-07.wav | 2:37:49 | 3:00:22 | 22:32.79 | 341M | pass |
| 9 | part-08.wav | 3:00:22 | 3:22:55 | 22:32.79 | 341M | pass |
| 10 | part-09.wav | 3:22:55 | 3:45:27 | 22:32.70 | 341M | pass |
Sample-accuracy proof. The ten segment durations sum to 13527.756827 s against the source at 13527.756825 s. The 2 microsecond gap is float rounding in the reported values, well under one sample at 44.1 kHz. Every part reads back as pcm_s24le, 44100, 2, so the format survived the cut.
Each of the ten parts cut into ten more at 135.27757 seconds each, giving 100 segments of roughly 2:15. Stream-copied again, so the PCM is still untouched.
Sample-accuracy proof. The hundred durations sum to 13527.756847 s against the source at 13527.756825 s. That 22 microsecond spread is float rounding accumulated over 100 readings, under one sample at 44.1 kHz. Zero format mismatches and zero decode failures across all 100.
| File | Part | Sub | Start | End | Length | MB |
|---|---|---|---|---|---|---|
| p00-s00.wav | 1 | 1 | 0:00:00.000 | 0:02:15.326 | 0:02:15.326 | 34.1 |
| p00-s01.wav | 1 | 2 | 0:02:15.278 | 0:04:30.511 | 0:02:15.233 | 34.1 |
| p00-s02.wav | 1 | 3 | 0:04:30.555 | 0:06:45.881 | 0:02:15.326 | 34.1 |
| p00-s03.wav | 1 | 4 | 0:06:45.833 | 0:09:01.066 | 0:02:15.233 | 34.1 |
| p00-s04.wav | 1 | 5 | 0:09:01.110 | 0:11:16.436 | 0:02:15.326 | 34.1 |
| p00-s05.wav | 1 | 6 | 0:11:16.388 | 0:13:31.621 | 0:02:15.233 | 34.1 |
| p00-s06.wav | 1 | 7 | 0:13:31.665 | 0:15:46.991 | 0:02:15.326 | 34.1 |
| p00-s07.wav | 1 | 8 | 0:15:46.943 | 0:18:02.176 | 0:02:15.233 | 34.1 |
| p00-s08.wav | 1 | 9 | 0:18:02.221 | 0:20:17.546 | 0:02:15.326 | 34.1 |
| p00-s09.wav | 1 | 10 | 0:20:17.498 | 0:22:32.731 | 0:02:15.233 | 34.1 |
| p01-s00.wav | 2 | 1 | 0:22:32.776 | 0:24:48.102 | 0:02:15.326 | 34.1 |
| p01-s01.wav | 2 | 2 | 0:24:48.053 | 0:27:03.286 | 0:02:15.233 | 34.1 |
| p01-s02.wav | 2 | 3 | 0:27:03.331 | 0:29:18.657 | 0:02:15.326 | 34.1 |
| p01-s03.wav | 2 | 4 | 0:29:18.608 | 0:31:33.841 | 0:02:15.233 | 34.1 |
| p01-s04.wav | 2 | 5 | 0:31:33.886 | 0:33:49.212 | 0:02:15.326 | 34.1 |
| p01-s05.wav | 2 | 6 | 0:33:49.164 | 0:36:04.397 | 0:02:15.233 | 34.1 |
| p01-s06.wav | 2 | 7 | 0:36:04.441 | 0:38:19.767 | 0:02:15.326 | 34.1 |
| p01-s07.wav | 2 | 8 | 0:38:19.719 | 0:40:34.952 | 0:02:15.233 | 34.1 |
| p01-s08.wav | 2 | 9 | 0:40:34.996 | 0:42:50.322 | 0:02:15.326 | 34.1 |
| p01-s09.wav | 2 | 10 | 0:42:50.274 | 0:45:05.507 | 0:02:15.233 | 34.1 |
| p02-s00.wav | 3 | 1 | 0:45:05.551 | 0:47:20.877 | 0:02:15.326 | 34.1 |
| p02-s01.wav | 3 | 2 | 0:47:20.829 | 0:49:36.062 | 0:02:15.233 | 34.1 |
| p02-s02.wav | 3 | 3 | 0:49:36.107 | 0:51:51.432 | 0:02:15.326 | 34.1 |
| p02-s03.wav | 3 | 4 | 0:51:51.384 | 0:54:06.617 | 0:02:15.233 | 34.1 |
| p02-s04.wav | 3 | 5 | 0:54:06.662 | 0:56:21.988 | 0:02:15.326 | 34.1 |
| p02-s05.wav | 3 | 6 | 0:56:21.939 | 0:58:37.172 | 0:02:15.233 | 34.1 |
| p02-s06.wav | 3 | 7 | 0:58:37.217 | 1:00:52.543 | 0:02:15.326 | 34.1 |
| p02-s07.wav | 3 | 8 | 1:00:52.494 | 1:03:07.727 | 0:02:15.233 | 34.1 |
| p02-s08.wav | 3 | 9 | 1:03:07.772 | 1:05:23.098 | 0:02:15.326 | 34.1 |
| p02-s09.wav | 3 | 10 | 1:05:23.050 | 1:07:38.283 | 0:02:15.233 | 34.1 |
| p03-s00.wav | 4 | 1 | 1:07:38.327 | 1:09:53.653 | 0:02:15.326 | 34.1 |
| p03-s01.wav | 4 | 2 | 1:09:53.605 | 1:12:08.838 | 0:02:15.233 | 34.1 |
| p03-s02.wav | 4 | 3 | 1:12:08.882 | 1:14:24.208 | 0:02:15.326 | 34.1 |
| p03-s03.wav | 4 | 4 | 1:14:24.160 | 1:16:39.393 | 0:02:15.233 | 34.1 |
| p03-s04.wav | 4 | 5 | 1:16:39.437 | 1:18:54.763 | 0:02:15.326 | 34.1 |
| p03-s05.wav | 4 | 6 | 1:18:54.715 | 1:21:09.948 | 0:02:15.233 | 34.1 |
| p03-s06.wav | 4 | 7 | 1:21:09.993 | 1:23:25.318 | 0:02:15.326 | 34.1 |
| p03-s07.wav | 4 | 8 | 1:23:25.270 | 1:25:40.503 | 0:02:15.233 | 34.1 |
| p03-s08.wav | 4 | 9 | 1:25:40.548 | 1:27:55.874 | 0:02:15.326 | 34.1 |
| p03-s09.wav | 4 | 10 | 1:27:55.825 | 1:30:11.058 | 0:02:15.233 | 34.1 |
| p04-s00.wav | 5 | 1 | 1:30:11.103 | 1:32:26.429 | 0:02:15.326 | 34.1 |
| p04-s01.wav | 5 | 2 | 1:32:26.380 | 1:34:41.613 | 0:02:15.233 | 34.1 |
| p04-s02.wav | 5 | 3 | 1:34:41.658 | 1:36:56.984 | 0:02:15.326 | 34.1 |
| p04-s03.wav | 5 | 4 | 1:36:56.936 | 1:39:12.169 | 0:02:15.233 | 34.1 |
| p04-s04.wav | 5 | 5 | 1:39:12.213 | 1:41:27.539 | 0:02:15.326 | 34.1 |
| p04-s05.wav | 5 | 6 | 1:41:27.491 | 1:43:42.724 | 0:02:15.233 | 34.1 |
| p04-s06.wav | 5 | 7 | 1:43:42.768 | 1:45:58.094 | 0:02:15.326 | 34.1 |
| p04-s07.wav | 5 | 8 | 1:45:58.046 | 1:48:13.279 | 0:02:15.233 | 34.1 |
| p04-s08.wav | 5 | 9 | 1:48:13.323 | 1:50:28.649 | 0:02:15.326 | 34.1 |
| p04-s09.wav | 5 | 10 | 1:50:28.601 | 1:52:43.741 | 0:02:15.140 | 34.1 |
| p05-s00.wav | 6 | 1 | 1:52:43.878 | 1:54:59.204 | 0:02:15.326 | 34.1 |
| p05-s01.wav | 6 | 2 | 1:54:59.156 | 1:57:14.389 | 0:02:15.233 | 34.1 |
| p05-s02.wav | 6 | 3 | 1:57:14.434 | 1:59:29.760 | 0:02:15.326 | 34.1 |
| p05-s03.wav | 6 | 4 | 1:59:29.711 | 2:01:44.944 | 0:02:15.233 | 34.1 |
| p05-s04.wav | 6 | 5 | 2:01:44.989 | 2:04:00.315 | 0:02:15.326 | 34.1 |
| p05-s05.wav | 6 | 6 | 2:04:00.266 | 2:06:15.499 | 0:02:15.233 | 34.1 |
| p05-s06.wav | 6 | 7 | 2:06:15.544 | 2:08:30.870 | 0:02:15.326 | 34.1 |
| p05-s07.wav | 6 | 8 | 2:08:30.821 | 2:10:46.055 | 0:02:15.233 | 34.1 |
| p05-s08.wav | 6 | 9 | 2:10:46.099 | 2:13:01.425 | 0:02:15.326 | 34.1 |
| p05-s09.wav | 6 | 10 | 2:13:01.377 | 2:15:16.610 | 0:02:15.233 | 34.1 |
| p06-s00.wav | 7 | 1 | 2:15:16.654 | 2:17:31.980 | 0:02:15.326 | 34.1 |
| p06-s01.wav | 7 | 2 | 2:17:31.932 | 2:19:47.165 | 0:02:15.233 | 34.1 |
| p06-s02.wav | 7 | 3 | 2:19:47.209 | 2:22:02.535 | 0:02:15.326 | 34.1 |
| p06-s03.wav | 7 | 4 | 2:22:02.487 | 2:24:17.720 | 0:02:15.233 | 34.1 |
| p06-s04.wav | 7 | 5 | 2:24:17.764 | 2:26:33.090 | 0:02:15.326 | 34.1 |
| p06-s05.wav | 7 | 6 | 2:26:33.042 | 2:28:48.275 | 0:02:15.233 | 34.1 |
| p06-s06.wav | 7 | 7 | 2:28:48.320 | 2:31:03.646 | 0:02:15.326 | 34.1 |
| p06-s07.wav | 7 | 8 | 2:31:03.597 | 2:33:18.830 | 0:02:15.233 | 34.1 |
| p06-s08.wav | 7 | 9 | 2:33:18.875 | 2:35:34.201 | 0:02:15.326 | 34.1 |
| p06-s09.wav | 7 | 10 | 2:35:34.152 | 2:37:49.385 | 0:02:15.233 | 34.1 |
| p07-s00.wav | 8 | 1 | 2:37:49.430 | 2:40:04.756 | 0:02:15.326 | 34.1 |
| p07-s01.wav | 8 | 2 | 2:40:04.707 | 2:42:19.940 | 0:02:15.233 | 34.1 |
| p07-s02.wav | 8 | 3 | 2:42:19.985 | 2:44:35.311 | 0:02:15.326 | 34.1 |
| p07-s03.wav | 8 | 4 | 2:44:35.263 | 2:46:50.496 | 0:02:15.233 | 34.1 |
| p07-s04.wav | 8 | 5 | 2:46:50.540 | 2:49:05.866 | 0:02:15.326 | 34.1 |
| p07-s05.wav | 8 | 6 | 2:49:05.818 | 2:51:21.051 | 0:02:15.233 | 34.1 |
| p07-s06.wav | 8 | 7 | 2:51:21.095 | 2:53:36.421 | 0:02:15.326 | 34.1 |
| p07-s07.wav | 8 | 8 | 2:53:36.373 | 2:55:51.606 | 0:02:15.233 | 34.1 |
| p07-s08.wav | 8 | 9 | 2:55:51.650 | 2:58:06.976 | 0:02:15.326 | 34.1 |
| p07-s09.wav | 8 | 10 | 2:58:06.928 | 3:00:22.161 | 0:02:15.233 | 34.1 |
| p08-s00.wav | 9 | 1 | 3:00:22.206 | 3:02:37.531 | 0:02:15.326 | 34.1 |
| p08-s01.wav | 9 | 2 | 3:02:37.483 | 3:04:52.716 | 0:02:15.233 | 34.1 |
| p08-s02.wav | 9 | 3 | 3:04:52.761 | 3:07:08.087 | 0:02:15.326 | 34.1 |
| p08-s03.wav | 9 | 4 | 3:07:08.038 | 3:09:23.271 | 0:02:15.233 | 34.1 |
| p08-s04.wav | 9 | 5 | 3:09:23.316 | 3:11:38.642 | 0:02:15.326 | 34.1 |
| p08-s05.wav | 9 | 6 | 3:11:38.593 | 3:13:53.826 | 0:02:15.233 | 34.1 |
| p08-s06.wav | 9 | 7 | 3:13:53.871 | 3:16:09.197 | 0:02:15.326 | 34.1 |
| p08-s07.wav | 9 | 8 | 3:16:09.149 | 3:18:24.382 | 0:02:15.233 | 34.1 |
| p08-s08.wav | 9 | 9 | 3:18:24.426 | 3:20:39.752 | 0:02:15.326 | 34.1 |
| p08-s09.wav | 9 | 10 | 3:20:39.704 | 3:22:54.937 | 0:02:15.233 | 34.1 |
| p09-s00.wav | 10 | 1 | 3:22:54.981 | 3:25:10.307 | 0:02:15.326 | 34.1 |
| p09-s01.wav | 10 | 2 | 3:25:10.259 | 3:27:25.492 | 0:02:15.233 | 34.1 |
| p09-s02.wav | 10 | 3 | 3:27:25.536 | 3:29:40.862 | 0:02:15.326 | 34.1 |
| p09-s03.wav | 10 | 4 | 3:29:40.814 | 3:31:56.047 | 0:02:15.233 | 34.1 |
| p09-s04.wav | 10 | 5 | 3:31:56.092 | 3:34:11.417 | 0:02:15.326 | 34.1 |
| p09-s05.wav | 10 | 6 | 3:34:11.369 | 3:36:26.602 | 0:02:15.233 | 34.1 |
| p09-s06.wav | 10 | 7 | 3:36:26.647 | 3:38:41.973 | 0:02:15.326 | 34.1 |
| p09-s07.wav | 10 | 8 | 3:38:41.924 | 3:40:57.157 | 0:02:15.233 | 34.1 |
| p09-s08.wav | 10 | 9 | 3:40:57.202 | 3:43:12.528 | 0:02:15.326 | 34.1 |
| p09-s09.wav | 10 | 10 | 3:43:12.479 | 3:45:27.617 | 0:02:15.137 | 34.1 |
Full manifest as a spreadsheet with a named table: ~/Music/Band-Practice/splits-100-manifest.xlsx
7.3.26 - 7:7:26, 4.57 PM_1.m4a is 377 MB, sent 2026-07-18 at 22:31 by +1 (816) 810-1202, and it was never downloaded. This is the high-bitrate version of the 7/3/26 jam. The copy you hold runs at 24 kbps, which is the one you called worse than an mp3.
Messages in iCloud is switched off here (CloudKitSyncingEnabled = 0), so the blob lived only on Apple's transfer servers under a roughly 30 day window. It was sent 45 days ago. Tap the bubble first, and ask for a re-send when that fails.
ffmpeg -v error -i band-practice-8-14-26.wav \ -f segment -segment_time 1352.7757 -c copy \ -reset_timestamps 1 part-%02d.wav