One-page reference with the per-codec audio frame math (AAC-LC 1024 samples / 21.33 ms, Opus 20 ms), the integer-segment alignment hint (8 s = 375 AAC frames at 48 kHz), the irreducible audio latency floor (priming + frame rounding + buffer), and the LL-HLS / LL-DASH authoring checklist.
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