Some big music stars will release albums this fall. “But whether any of them can sell the type of huge numbers that the industry enjoyed two, three years ago — or even last year — remains to be seen. While music sales have been on the downward trend the past few years, this year’s slippage has reached alarming levels, and it’s unclear whether the release of any artist — even two powerhouses on the same day — will prompt consumers to reach for their wallets.”