Lost & Found Sound: Jack Mullin Obit We remember Jack Mullin, the California man who brought two German tape recorders back from the Second World War and introduced the technology to America. Mullin was an member of the US Army Signal Corps, and stumbled upon reels of magnetic quarter-inch tape and machines in a town near Frankfurt. He came back and perfected the machines. On Novermber 16, 1946, he demonstrated how they worked to a meeting of audio engineers in his home state of California. Soon Bing Crosby started using them to pre-tape his radio show for ABC. Crosby also pioneered the efforts to make tape recorders and recording tape in this country. Mullin worked for Crosby and later for Ampex. Mullin died last week at his California home at age 84.