There are 28 Banished Audio Logs in Halo Infinite. Here's a guide how to find them:
00:00 Archeological Findings 1. Audio Log - Reintroduction
00:58 Archeological Findings 2. Audio Log - Assumptions
02:09 Archeological Findings 3. Audio Log - Xalanyn
03:23 Archeological Findings 4. Audio Log - A Curious Directive
04:47 Escharum's Testimony 1. Warship Gbraakon Banished Audio Log
06:29 Escharum's Testimony 2. Banished Audio Log - Cylix
07:50 Escharum's Testimony 3. The Tower Banished Audio Log - Harbinger
09:28 Escharum's Testimony 4. Excavation Site Banished Audio Log - Demon
11:04 Escharum's Testimony 5. Pelican Down Audio Log - Reformation
12:19 Escharum's Testimony 6. Pelican Down Banished Audio Log - Home
14:17 Escharum's Testimony 7. Pelican Down Banished Audio Log - Loyalties
15:45 Escharum's Testimony 8. House of Reckoning Audio Log Victory
17:30 Escharum's Testimony 9. House of Reckoning Audio Log Legacy
18:56 Outpost Intel 1. Armory of Reckoning - Of Unrest and Unggoy
20:09 Outpost Intel 2. Armory of Reckoning Audio Log - A Warning
21:29 Outpost Intel 3 Horn of Abolition Audio Log - A Boon
22:54 Outpost Intel 4 Horn of Abolition Audio Log - Our New Home
24:50 Outpost Intel 5. Forge of Teash Audio Logs Re - Damnable Eyes
26:07 Outpost Intel 6. Forge of Teash Audio Logs - Secrets Below
27:25 Outpost Intel 7. Redoubt of Sundering - That Which Remains
28:31 Outpost Intel 8. Redoubt of Sundering Audio Log - Remain Vigilant
29:38 Outpost Intel 9. Ransom Keep Audio Log - Unnatural Defenses
30:35 Outpost Intel 10. Ransom Keep Audio Log - The Dream of Atriox
32:05 Outpost Intel 11. Annex Ridge Audio Log - Slow and Steady
33:40 Outpost Intel 12. Annex Ridge Audio Log - Whispers From The Past
35:01 Outpost Intel 13. Riven Gate Audio Log - The Great Spine
36:00 Outpost Intel 14. Riven Gate Audio Log - Encroaching Glory
37:18 Outpost Intel 15. Outpost Tremonius Audio Log - In Your Honor