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Swift 6 introduces typed throws, making error handling more predictable and type-safe. A custom SystemError protocol helps developers create

Fair observation — and it lands on the one spot where our stack _does_ fire MIDI bytes per call, though probably not the design you’re picturing. Architecture first, because it decides where jitter can live: on FL 2026 the control-script sandbox blocks sockets entirely (`SystemError NULL`; `OnIdle` never fires on this build), so the command transport is **file-RPC + a MIDI wake byte** — the client writes a length-prefixed JSON request file, then sends a single `CC20 [0xB0,20,0]` over a loopMIDI port; `OnMidiMsg` fires inside the device script and pumps the request queue on FL’s main thread. Roundtrip ~0.12–0.19 s per call. On FL 2025 builds the same protocol runs over TCP `127.0.0.1:9876` with an `OnIdle` drain (32 reqs/tick). Either way: MIDI is a _trigger_ , never the payload. So yes — rapid-fire calls become rapid MIDI bytes plus file writes, and we’ve measured the failure mode live: ~700 `triggerNote` calls at ~100–150 ms each overran an 11 s recording window at 174 BPM (pattern inflated to 368 steps instead of 128; playback ≈75 BPM). An earlier wake variant sent a _note pair_ per call — ~90 junk notes landed inside a recorded clip. Now a single CC; zero pollution. On the buffering suggestion specifically: the same shape already exists in-process (script-side queue drained per pump tick; file-RPC _is_ store-and-forward). An out-of-process node buffer would smooth bursts but not lift the floor — our jitter lives in file-write + wake roundtrip, not byte rate. Where it would bite is a **SysEx-payload design** that puts command data on the wire — a few hundred bytes of SysEx costs tens of ms of skew at MIDI rates. Two existence proofs worth naming: **ae5n/fl-mcp** implements exactly your proposal (resident Node companion + SysEx into the FL controller) on macOS, and **flapi** documents the hard version — a chunked SysEx protocol designed around Windows’ 1024-byte pre-allocated MIDI buffer and FL’s PEP-578 audit sandbox. Honest boundary on our own numbers: we’ve measured the roundtrip floor and the overrun failure — not a jitter _distribution_. Our deliberate split: RPC for the control plane (150 ms is free there), streamed real MIDI into an armed recording for timing-dense material (sample-accurate path), and a CC side channel on a second loopMIDI port as the designed-but-unbuilt event-driven lane. If your jitter observation came from a payload-on-wire bridge — SysEx-encoded commands — the magnitudes you measured would be directly useful before we build that CC lane. What did you see, and on which transport?

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A sudden system error disrupts global news feeds and data platforms worldwide. Find out what triggered the outage and how networks are respond...

A severe global system error and network failure are disrupting major platforms worldwide. Find out what happened behind the scenes.

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