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  2. RCA Photophone - Wikipedia

    en.wikipedia.org/wiki/RCA_Photophone

    RCA Photophone was an optical sound, "variable-area" film exposure system, in which the modulated area (width) corresponded to the waveform of the audio signal. The four other major technologies were the Warner Bros. Vitaphone sound-on-disc system, as well as three "variable-density" sound-on-film systems, Lee De Forest 's Phonofilm , and Fox ...

  3. High fidelity - Wikipedia

    en.wikipedia.org/wiki/High_fidelity

    Some multitrack recordings were made on optical sound film, which led to new advances used primarily by MGM (as early as 1937) and Twentieth Century Fox Film Corporation (as early as 1941). RCA Victor began recording performances by several orchestras using optical sound around 1941, resulting in higher-fidelity masters for 78-rpm discs .

  4. Optical sound - Wikipedia

    en.wikipedia.org/wiki/Optical_sound

    The stereo optical sound strip is located on the right, with waveforms for left and right channels. To the far left is the SDDS digital track (blue area to the left of the sprocket holes), then the Dolby Digital (grey area between the sprocket holes labeled with the Dolby "Double-D" logo in the middle), and to the right of the analog optical ...

  5. Composite video - Wikipedia

    en.wikipedia.org/wiki/Composite_video

    Composite video is an baseband analog video format that typically carries a 405, 525 or 625 line interlaced black and white or color signal, on a single channel, unlike the higher-quality S-Video (two channels) and the even higher-quality YPbPr (three channels).

  6. Video game livestreaming - Wikipedia

    en.wikipedia.org/wiki/Video_game_livestreaming

    The live streaming of video games is an activity where people broadcast themselves playing games to a live audience online. [1] The practice became popular in the mid-2010s on the US-based site Twitch, before growing to YouTube, Facebook, China-based sites Huya Live, DouYu, and Bilibili, and other services.

  7. Postpartum Weight Loss: 3 Steps to Get Started (& More Tips ...

    www.aol.com/postpartum-weight-loss-3-steps...

    1. Eat Nutritious Foods. A healthy eating plan is the cornerstone of any weight loss journey. Eating nutritious foods can also help you avoid postpartum weight gain. Opt for whole foods full of ...

  8. Far-left Antifa activists waiting to see Trump actions. How ...

    www.aol.com/far-left-antifa-activists-waiting...

    Buoyed by promised pardons of their brethren for their Jan. 6 crimes and by Trump’s embrace of popular extremist far-right figures, those groups will likely see a resurgence after January ...

  9. Pallophotophone - Wikipedia

    en.wikipedia.org/wiki/Pallophotophone

    However, unlike later multitrack optical, magnetic, and digital sound recording systems, multiple tracks on pallophotophone films are not known to have been used for later mixdown or similar post-production purposes, or for simultaneously recording two or more channels for stereophonic sound reproduction. Multiple narrow tracks, recorded one at ...