FA-10783 / PCM sample encoding / Member archive
Unsigned eight bit silence center · case 03
Unsigned PCM silence is interpreted as a positive amplitude.
Case contract
Decode unsigned 8-bit PCM byte integers into centered integer amplitudes by subtracting 128.
Why this case matters
A pure Python local audio pipeline stage with explicit sample formats and frame conventions; no real-time device or signal-spectrum claims.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| fixture 1 | [0, 128, 255] | [-128, 0, 127] | Failed |
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