Endurance is a test we can fail.
The engine carries a soak suite that renders millions of samples through a busy project, rotating state as it goes, and asserts four things: no leak, no NaN, no drift, no peak runaway. Three of those tests cover a compressed 24 hours. They are marked ignored by default so ordinary CI does not pay the wall-clock cost, and run deliberately. Alongside them sit around a dozen adversarial fuzz and boundary files under a written policy: every new public API or engine command gets a test in the matching category, because each of these bug classes has shipped to a user at least once.
The audio thread does not surprise you.
Once the engine starts, its audio path never allocates memory and makes no system call: two of the usual causes of a dropout at the worst moment. Edits reach it over lock-free ring buffers, never by contending for it. If a value inside the engine goes out of range it is caught and that track is muted for an instant rather than sent to the speakers at full scale. The rest of the set keeps playing.
A few percent of the time budget.
The engine is written in Rust, with an audio path that never allocates once it starts. On an M-series Mac, a deliberately busy set, four decks, effects on every one, dozens of live modulation routes, uses under 3% of the time the audio device gives it per block. With that headroom, a filter sweep tracks your hand instead of trailing it. You can run buffers down to 64 samples, or 32 if your interface allows.
Soft stop is a vinyl brake.
Pressing stop does not chop the audio. It drops the tempo to zero over roughly a quarter of a second with a saturator on the master, so it feels like pulling a record to a stop. When you do want the hard cut, hold shift and the master silences in a single buffer.
If it ever goes down, the set is still on tape.
A tape you never have to arm: the last 30 minutes of the post-limiter master sit in memory and save to disk with one click. Saving happens on another thread, so it never gates the live signal. A hard crash is rare and we test hard against it, but if one ever happens, what you played is already on disk, unclipped and ready to pull into your DAW the next morning.
Activation works offline.
After the first online activation, every launch verifies the licence locally. The venue’s wifi is never your problem, and the optional update check is one toggle away from being off. The set does not depend on a network you do not control.
