FA-10879 / Audio frame buffers / Member archive
Underrun zero fill · case 04
A device callback returns fewer samples than the hardware requested.
Case contract
Produce exactly nonnegative requested mono signed-PCM samples, filling a shortage with zero and excluding surplus.
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 | [1] | [1, 0, 0] | Failed |
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