Hope I can make this clear. I have a series of slide shows that my dad created using two 35mm slide projectors, and a Wollensak (3M) 2866 Multi-image Recorder/Dissolver. the Dissolve unit was used to alternate the two slide projectors and has a cassette tape which had same kind of a signal in the recording that triggered the fade-in/fade-out of each projector timed to the narration on the slides. I want to convert the slide shows to digital format to preserve them. I have the ability to scan in the slides to my computer but I do not know how to convert the audio file to a digital format and preserve the timing of the show. I don't know what the "trigger" on the tape was to make the slides change and if that can be embedded in a file that I copy to digital. Any assistance would be greatly appreciated or if there is a better forum to post this, please let me know.