I started using the Radio Shack Optimus cassette recorder, but no one uses cassettes any more. I found a way of converting the cassettes by using a device I picked up at Radio Shack, transfered the files into my PC and converted the audio to CDs.
A couple of years ago I heard about the Sony IC Recorder ICD-SX57 and I purchased one. It has a noise eliminator and transfer automatically into my PC when I plug in the USB adapter. It then converts to an MP3 automatically and I import it into the Sony Studio program, insert the tracks, the 15 second music intro and the end music. I edit the content to make sure there aren’t any major pauses, excessive conversations or anything that might be distracting to the program.
If the program is too long to fit on on one CD I duplicate it and make a two CD set.
There are several services I have found when the quantity of the same CD exceed my capacity. Once you’re ready to order a thousand CDs at at time you can use a service which is NationWide Disc. You might find sources locally who will do smaller runs.
Just remember, every time you prepare a presentation, record it.
You can also record your own presentations on your computer with a headset.
Either way, there is no limit to the number of products you can create.