FA-81724 / MIDI event timing / Member archive

Active sensing timeout detection: only sensing messages refresh the timer · case 04

A stream with regular note messages but sparse sense messages times out although traffic never stopped.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [messages, end_time] where messages are time-ordered [ms, kind]. Monitoring is armed by a "sense" message. While armed, if more than 300 ms pass between any two consecutive messages (of any kind), a timeout is reported at previous message time + 300 and monitoring disarms until the next sense message. At end_time the same check applies to the last message. Return the list of timeout times.

Why this case matters

MIDI sequencers, file readers and synth drivers depend on exact event ordering and tick/time arithmetic.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
oracle 4	`[300]`	`[]`	Failed

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