Some time back, I did a massive conversion of my rare collection audio tapes into CD format.
My simple process involved:
- Playin the audios tapes from a separate
- Feeding the output of above into the mic input of a PC
- Capturing the input using available software (I had some crude tool that came with the Motherboard)
- Processing the resulting audio files (Trimming off paused, sound levelling, etc)
The trick was in tinkering with the settings on the tools used.
Else, I believe there are guys who offer the same service commercially.