Here’s how to determine if your 8mm film has sound:
95% of Super 8 film is silent. 99.9% of Regular 8 film is silent. Regular 8 Sound was recorded after capturing the film. Super 8 Sound came out in 1972. Popular towards the late 1970’s, early 1980’s and was in sync audio and visual. Super 8 Sound on the whole is not the best quality. Very grainy, contrast issues and consistently overexposed, caused mostly by operator error and lower quality cameras, film and developing. 99.9% of companies around the world transfer Super 8 Sound with Super 8 Sound projectors, speeding up the film to 20fps to eliminate flicker. With that increase in speed, the sound is also sped up, so the pitch changes and voices sound like Alvin & Theodore!
Here’s a video on our Super 8 Sound transfer process. ( We have only one of four machines worldwide to transfer sound correctly)