For decades, essentially every television comedy had audible laughter. Sometimes recorded from a live studio audience, sometimes added in post-production from a library.
Then, over a fairly short period, it disappeared from most new comedy. The single-camera, no-audience format became the default, and laughter on a soundtrack now reads as either nostalgic or old-fashioned.
The reasons are more interesting than "audiences got more sophisticated", which is the usual explanation and is mostly self-congratulation.
What the laugh track was for
Two functions, and they're worth separating.
Signalling. Telling the audience where the jokes are. That sounds patronising and it isn't entirely — comedy timing depends on a beat after a punchline, and without laughter that beat is just silence. The audio cue lets the performance breathe.
Social facilitation. There's reasonable evidence that people laugh more when they hear others laughing. Laughter is contagious, and canned laughter does produce measurably more amusement in viewers, at least in the studies that have looked at it. Whether it makes people rate the material as funnier is more contested.
So it was doing real work. The question is whether the work was worth the cost.
What changed technically
The multi-camera studio format that produces genuine audience laughter has specific constraints. Sets have to be built as three-walled boxes facing an audience. Lighting has to be flat enough to work from multiple angles simultaneously. Scenes are long, because you're performing for a live crowd.
Single-camera production removes all of that. You can shoot on location, use cinematic lighting, cut rapidly between short scenes, use visual jokes that depend on framing.
Once comedy writers had access to that toolkit, they wanted it. And a great deal of what it enables — quick cutting, cutaways, visual gags, tonal shifts — doesn't work with an audience track. You can't pause for laughter after a two-second cutaway.
So the format change came first and the laugh track died as a consequence, rather than the other way round.
The tonal argument
The other driver, and probably the more important one.
Modern comedy frequently wants to be sad. The shows that have defined the last fifteen years mix genuine emotional weight with jokes, sometimes within the same scene.
A laugh track makes that impossible. Laughter is a commitment — it tells the audience this is funny, so nothing can be simultaneously devastating. The moment you want a joke to land and then curdle, the track has to go.
This is, I think, the real reason. Not sophistication, but a change in what comedy was trying to do. Shows aiming for pure joke density are perfectly well served by a studio audience; shows aiming for tonal ambiguity aren't.
What was lost
Genuinely some things, and the reaction against laugh tracks has been overdone.
Joke density. Multi-camera studio comedy at its best is astonishingly efficient — jokes per minute that single-camera shows rarely approach, because the format was built around them and the writing was tested on a live audience.
Performance. Studio comedy is closer to theatre. Actors perform scenes in long takes in front of people, and the best of them are doing something that doesn't exist in single-camera work.
The rehearsal process. Multi-camera shows traditionally rewrote based on how material played to an audience during the week. That's an empirical feedback loop that single-camera production doesn't have, and it produced very sharp scripts.
Communal viewing. A show that sounds like a room full of people is a different experience alone on a sofa than one that's silent. Whether that matters is subjective; I'd say it does.
The comedy-drama drift
A consequence worth naming. Without laughter, the boundary between comedy and drama blurred, and a lot of what's nominally comedy now isn't especially funny.
That's produced excellent work. It's also produced a category of half-hour show that's essentially a drama with a wry tone, occupying comedy slots and comedy award categories, which has made both categories less meaningful.
And there's a genuine loss for viewers who wanted to laugh. The straightforwardly funny half-hour show has become harder to find, and demand for it clearly persists given the enduring popularity of older studio comedies on streaming.
Whether it comes back
Probably in some form. There have been periodic revivals, and live studio recording has a specific energy that's hard to replicate.
What seems unlikely to return is the sweetened laugh track — laughter added or enhanced in post from a library. That specific practice does feel dated, and audiences have become good at detecting it.
Genuine audience laughter is a different proposition. When it's real, and the performance earned it, it doesn't read as manipulation. It reads as a room enjoying itself, which is what comedy is supposed to sound like.
The international dimension
One aspect rarely mentioned: laughter travels poorly. A studio audience track recorded for a domestic audience carries cultural timing that does not necessarily match how a joke lands elsewhere, and dubbed versions have historically had to make awkward decisions about whether to keep it.
As comedy production became more oriented towards international distribution, that became a practical consideration. A show intended for simultaneous release across dozens of territories has an incentive towards a soundtrack that does not tell any particular audience when to laugh.
It is a small factor next to the tonal and technical ones, and it points the same direction, which is probably why the change was as complete as it was.