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| 8MM can record so much longer in a smaller space because it eliminates the linear track, recording both video and audio on the helical track. |
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| 8MM uses AFM (Audio Frequency Modulation) audio recording on the Helical track, combining it permanently. Although not a problem of quality, you cannot perform an audio dub (substituting the audio on the track for something else at a later date). To do this, you must copy the track you want to edit onto another tape. |
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| PCM recording involves putting audio on the other layer of the 8MM tape. Using this PCM track requires editing equipment, but allows you to overdub as needed. |
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| This is the reason 8MM tape beats out VHS tape for most filmmakers. Time code is set on the tape and allows you to pinpoint down to the 10th of a second where you are setting a mark. This allows you to prerecord into the editing software where you are importing, which means when you re-import your video, you can actually let the software do it for you. |
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