I have a number of ALAC files that are twice or three times the size of the FLAC original.

I take it they have been padded with zeroes to fake the desired bitrate or sample rate in XLC.

I don't have easy access to the FLAC originals to find and recreated the affected ALAC files.

How can I use dBpoweramp to detect which files have been padded in this way, removing the padding but not the original information.

I assume that if I just convert at a lower bit-rate, the padding will be treated as actual information, and so actual information will be lost.