Sound film Transfer
There are many different types of sound film....

Regular 8mm (very rare: less than .1% of R8 film has sound)
     - add 20% to the transfer total price
    - sound was usually added after shooting (dubbed audio)
    - very few 8mm cameras could record synchronized sound on film
    - sound quality - poor by today's standards but fully understandable
    - Look for a thin constant brown magnetic stripe(s) on the side of film.
 
Super8 (rare: less than 5% of super8 film has sound)
    - add 10% to the transfer total price
    - Super8 sound cameras record synchronized sound
    - some super8 sound projectors could dub additional sound onto the film
    - sound quality - variable based upon microphone and initial recording skill or effort
    - balance track not transferred
    - Look for two thin constant brown stripes on the side of the film.

16mm Magnetic Stripe (rare)
     - add 10% to the transfer total price
     - usually sync sound but can be re-rerecorded after the film was shot
     - not common for home movies
     - high quality audio is possible
     - Look for sprocket holes on one side of the film & brown constant stripe on the other side.

16mm Optical sound (common)
     - add 10% to the transfer total price
     - standard on 16mm prints
     - optical track could be recorded with sync sound cameras (rare)
     - not common for home movies
     - high qulaity audio is possible, but mediocre results are possible too..
     - Look for sprocket holes on one side of the film & a white audio waveform on the other side

16mm Dual System / Full coat (professional only)
      - One reel of picture and one reel of (brown) magnetic film
     - each reel is 14 cents per foot
     - can be synced in an editor for a nonimal charge (call for details)
     - high quality audio is possible

35mm Optical sound (common)
     - standard on 35mm prints.
     - sound transfer included in $0.09 per foot transfer price.
     - high quality audio is normal, very old prints can be mediocre.
All audio is recorded as the film is being scanned. High quality optical and megnetic pickups are used.

Optical & magnetic pickups are optimized & positioned for each project to get the maximum sound gain from the film.

All audio is digitized & processed by a hardware based digital parametric equalizer to reduce hiss & other defects.

It is very important to note that audio quality is dependent upon the initial recording done by the camera operator.