Next time I am asked if I can play antique and obsolete recording formats -

- like audio cassettes

we can do even better: http://www.smithsonianmag.com/history-archaeology/We-Had-No-Idea-What-Alexander-Graham-Bell-Sounded-Like-Until-Now-204137471.html#

We Had No Idea What Alexander Graham Bell Sounded Like. Until Now

Smithsonian researchers used optical technology to play back the unplayable records 

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