> Hello. Is there a software which checks differences between > audiofiles?
In the mac world, Sound Designer II, a destructive editor, offers two very useful features; "compare files" and "find peak". "Compare files" takes two files, inverts the second one, then adds them together in a separate file. "Find peak" locates the largest positive or negative sample in a soundfile. I use these two features in combination all the time to verify bit for bit accuracy when making cd-r archives of soundfiles and to verify correct functionality in all audio programs that I use. The idea is that if one performs a process on or with a soundfile that should theoretically produce an identical copy, such as making a copy on cd-r or bouncing a single monophonic file at unity gain to a new file, then comparing these two files should produce a diff file that contains all zeros. The "find peak" feature verifies this. If the "find peak" feature finds any samples in the diff file that are not zero, then there is an error somewhere (bug, documentation, or user error). With this method, I have found errors in every program that I use, and am confident that all of my cd-r archives (two of everything that makes its way into a final mix) are identical copies of the originals. Fortunately there is enough redundancy in audio apps that I have been able to identify at least one accurate method for accomplishing everything between the three apps that I use. Any linux audio app that I use in the future will have to pass this test, so first there needs to be a linux audio app that can perform this test :) Tom
