FA-49514 / PCM sample encoding / Member archive

Aiff pcm offset block: block alignment · case 04

Block alignment is checked at the enclosing chunk instead of first PCM byte.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

For stipulated AIFF-like sound chunks, exclude the eight-byte offset/block preamble and offset prefix, count complete PCM frames and inspect absolute block alignment.

Why this case matters

Offline PCM interchange uses these exact bounded packet and sample representation decisions.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
oracle 2	`[[20, 3, 0, true], [25, 2, 2, true]]`	`[[20, 3, 0, true], [25, 2, 2, false]]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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