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How did the audio industry transition from analog to digital professional recording?

I am doing a research paper on the history of audio recording technology. I am really having trouble finding information that fills in the gaps between analog tapes to cds. I am looking for inventions and such to fill in the timeline, much thanks.

Public Comments

1. Not sure, but CDs were invented in the 80's. That's all I can give you.
2. Have you tried WIKIPEDIA.org? I googled your question and found a very long answer there.....too much to answer here....