i get tracks sent to me at my mastering house more and more that have been run through HARBAL.
while it has never done anything negative to the tracks it certainly isnt a home mastering solution, even if by some miraculous stroke of fate you had no issues in your track.
what it does do however is attempt to address frequency spread and balance and the changes it makes are for the better though never complete or fully satisfactory.
mastering is much more complicated than this program makes out and the only real tool is your ears. a visual feedback can be helpful for specific taks but should never be relied upon over anything your ears are telling you.
it certainly wont destroy your tracks however.
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