An antique cinema projector in a dark projection booth, its beam of light cutting through the dusty air towards a small window
AI-generated image, not a photograph of a real person or place.
doodlehollywood

FILM HISTORY, IN PLAIN ENGLISH

Then the pictures
talked.

IN SYNC at last

  • One motor for both
  • Loud enough to fill a hall
  • Sound on the film itself
  • Three problems, finally solved

Sound films were tried for 30 years before they worked.

From 1896, dozens of systems tried to play a record alongside a film, and almost all failed. Then electrical recording, loudspeakers and a single motor driving picture and sound together changed everything, fast.

Updated

Compare the systems

THE SHORT ANSWER

Three problems,
then a rush.

A Library of Congress essay names the three
reasons early sound films kept failing.

THE PROBLEM

Why it kept failing

Early systems lacked foolproof synchronisation, could not fill a theatre from a horn phonograph and recorded sound that was less than realistic.

Compare the systems

SOUND-ON-DISC

One motor, one disc

A 1920s system used a 16-inch disc at 33⅓ rpm, driven by the same shaft and motor as the projector, so picture and sound stayed together.

See the numbers

SOUND-ON-FILM

Printed beside the picture

Optical sound recorded the soundtrack on the film strip itself. One surviving 1927 projector has heads for both methods, but disc sound did not last.

How it changed sets

COMPARE THE SYSTEMS

How did they
match the sound?

Pick a method. The bar shows how well it solved the synchronisation problem, as museum and archive sources describe it.

Sound systems

Choose a method
Actors miming to a recordFragile

Some early systems had actors lip-sync to a pre-recorded record. Most tried to keep a flat disc or cylinder in step with a separate projector, and failed.

A phonograph linked by pulleysFailed

The Library of Congress essay notes one early system failed partly because rats chewed the pulleys connecting the cylinder phonograph to the projector.

Electrical sound-on-discWorked, clumsily

One motor drove projector and 16-inch disc, with electrical recording and loudspeakers. But a feature could need 25 separate discs, later cut to ten.

Optical sound-on-filmBuilt in

The soundtrack travels on the film strip, so it cannot drift. UCLA's history covers variable-density and variable-area optical methods, and the end of sound-on-disc.

Sources: Library of Congress, The Jazz Singer essay by Ron Hutchinson; Museum of the Moving Image collection; UCLA Film and Television Archive, A Century of Sound.

Drawn from the Library of Congress National Film Registry essay on The Jazz Singer, the Museum of the Moving Image and the UCLA Film and Television Archive.

TWO NUMBERS WORTH KNOWING

A little talk,
a big change.

Both figures come from the Library of Congress
essay on the first successful talking feature.

≈ 2 minutes

Spoken dialogue in the famous 1927 talking feature

The Jazz Singer was largely silent, with music and sound effects, and just 2 minutes of actual dialogue. It premiered in two theatres on 6 October 1927.

DIALOGUE · LIBRARY OF CONGRESS

235

Theatres showing it by March 1928

It was then the only feature with dialogue and singing. By the end of 1929, about two years after its premiere, the essay says the silent picture was dead.

SPREAD · LIBRARY OF CONGRESS

The Museum of the Moving Image dates the first paid public show using the sound-on-disc system to 6 August 1926 in New York: music and sound effects, but no spoken dialogue in the feature.

WHAT SOUND CHANGED

New studios,
new habits.

A strip of 35mm film held up to a window, with a thin wavy soundtrack line running down beside the frames
AI-generated image, not a photograph of a real person or place.

The switch reached far beyond the projection booth. The sources describe a whole industry rebuilding itself.

  1. Studios were wired

    A Hollywood studio was wired for sound in 1927 before the singing and talking scenes were shot over nine days.

  2. Several cameras at once

    Scenes were filmed with three cameras running together while the sound went onto a single disc master.

  3. Takes got counted

    One song needed seven takes and another just two, each recorded with its sound onto the disc master.

  4. Booths changed too

    One surviving 1927 projector carries both a phonograph for sound-on-disc and an optical sound head for sound-on-film.

SAVING THE SOUND

Lost discs,
found again.

A large black shellac record on an old turntable, lit from the side so its grooves catch the light
AI-generated image, not a photograph of a real person or place.

Because early sound sat on separate discs, many films survived without their soundtracks. A 1989 Museum of Modern Art programme showed restorations of films from 1926 to 1931 made with surviving discs transferred onto film soundtracks.

The Library of Congress essay notes a collectors' project, begun in 1991, has found nearly 600 soundtrack discs in private hands and helped restore nearly 150 sound shorts.

Questions

Questions people ask

Was The Jazz Singer the first talking picture?

No. The Library of Congress essay says it was not the first or even the thousandth, but it was the first successful synchronised feature with talking.

Why did early sound films fail?

Poor synchronisation, phonographs too quiet to fill a theatre and unrealistic acoustic recording, according to the Library of Congress essay.

What is sound-on-disc?

The sound is recorded on a separate disc played in step with the projector. One 1920s system used 16-inch discs at 33⅓ rpm driven by the projector's own motor.

What is sound-on-film?

The soundtrack is recorded optically along the edge of the film strip, so picture and sound travel together. UCLA's history traces how it replaced disc sound.

How quickly did silent films disappear?

Fast. By the end of 1929, about two years after the 1927 premiere, the Library of Congress essay says the silent picture was dead.

Sources

Where the facts come from

  1. Library of Congress National Film Registry: The Jazz Singer, essay by Ron Hutchinson (PDF)
  2. Museum of the Moving Image: sound-on-disc projector, ca. 1927
  3. Museum of Modern Art: The Dawn of Sound fact sheet (1989, PDF)
  4. UCLA Film and Television Archive: A Century of Sound

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