Yeah the ping sound of silver depends on the way it is minted. Maples don't ping well due to their thickness and the way the silver is formed into the coin. Silver with some copper in it (like 80% or 90% silver) often pings a lot better than pure silver, and thinner coins ping better than thicker ones.
Sales of American Eagle silver coins by the U.S. Mint jumped to a record this month on increased demand for an alternative to currencies as the Federal Reserve plans to print $1 Trillion dollars.
Sales surged to 7.42 million ounces so far in January, the biggest monthly total since 1986. The figure compares with the 1.635 million ounces sold in December, according to mint data.