In this picture you can see the waveform of the audio track on film, but how in the world can you create sound from just a amplitude?:
Picture: [https://images.squarespace-cdn.com/content/v1/57e9a1c0f7e0ab213fe99f4a/1493060981670-OAI5ANMFURAHOO6XF2OQ/Screen+Shot+2016-12-01+at+5.20.55+PM.png](https://images.squarespace-cdn.com/content/v1/57e9a1c0f7e0ab213fe99f4a/1493060981670-OAI5ANMFURAHOO6XF2OQ/Screen+Shot+2016-12-01+at+5.20.55+PM.png)
i understand how sound can be reproduced like on speakers and such, Does a image of a wave form ACTUALLY contain audio data?
In: 6
Remember the film is going by a set frame-rate, that’s the missing dimension. If you play it too slow or fast the pitch will shift, but since it’s made with an assumed framerate you don’t need more information encoded.
In the case of that sound-on-film it was down to using a light source modulated by those images to reproduce the sound.
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