The vinyl brake, why soft stop is 250 milliseconds
When you press stop on LiveSet, the master takes a quarter-second to fall to zero with a saturator over the top. Not because it sounds nice, because a cliff stop sounds wrong.
The first time we shipped a build without soft stop, a friend played a set and emailed at 3 AM. “When you stop, it feels like the song got murdered.”
He was right. Press space; audio cuts; the room hears silence in one buffer. Technically correct. Musically wrong. The bar didn’t end: the bar got shot.
What’s wrong with hitting stop
A cliff stop has two problems.
The first is the click. Even if the kick was on a zero crossing, the FX tails weren’t. A reverb in the middle of its decay gets sliced off. The phase of the delay’s wet bus is wherever it is. You hear that as a soft click on small speakers and a brutal smack on a club PA.
The second is the abruptness. Every set you’ve ever heard end in a club ends with something: a slowdown, a fade, a vinyl brake, an FX wash. Even Hawtin closing out a peak-time hour does something on the way out. The audience expects a wind-down because the audience has been listening for two hours.
A cliff stop violates both of those.
What we shipped
Press stop and three things happen in 250 milliseconds:
- The tempo ramps from current to zero.
- The master saturator pre-emphasises the low end as the speed drops.
- The recorder keeps running through the whole thing.
You hear a pitch-down with a soft squash on the bass: a vinyl brake. The kick lands once or twice during the brake. The reverb tails get to finish. The delays fade with the tempo. The audience hears “set is ending”, not “set was killed”.
If you really need a cliff cut, for a hard transition, for a power emergency, for an actual mistake, hold shift. The master silences in one buffer. That’s the cliff, and you have to ask for it.
Why 250 ms specifically
We tried a few. 100 ms felt almost-cliff. 500 ms felt like the rig was tired. 250 ms is the number where the brain reads “deliberate fade” without reading “the DJ is dragging it out”.
The slowdown curve isn’t linear. It’s a fast initial drop, the first 60 ms takes the tempo from 100% to about 65%, followed by a slower decay to zero. That matches what a vinyl record physically does when you stop the platter. Linear sounds wrong; logarithmic sounds right.
What this means for your set
You can plan stops. The end of a peak-time hour, the breakdown before a long blend, the dramatic pause before the encore: all of those work because the engine handles the transition. You stop being responsible for “and now I gracefully bring the audio down”. You press space; the rig does the job.
It also means you can mess up. If you hit stop on bar 31 of a four-bar phrase, the brake takes you out at the wrong moment. But that’s true of every transition in every set. You eat the mistake and play the next thing.
The vinyl brake is a small thing. It’s a quarter of a second of code. It changes what the end of a set feels like.