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TAS2557: moving from tas2555

Part Number: TAS2557
Other Parts Discussed in Thread: TAS2555,

Due to availability, my customer is interested in moving from the TAS2555 to the TAS2557. From a hardware perspective, they grounded the IN_P and IN_M lines on the TAS2555, but the TAS2557 says to NC this pins. Can we leave these pins as GND or do we need to change layout to float them?