What audio editor lets you select a type of sound to remove (e.g. hiss)?

Hi all, I'm new here and am just in the process of abandoning Windows in favour of a Mac. (I grew up on an Apple ][e and the first Mac FWIW!)
I am used to Sony Sound Forge and other PC audio editors, and need to choose my program of choice on the Macbook Pro.
There is one killer feature I need. It's kinda hard to describe, but basically it lets you select a region of audio that you want to 'memorise', and it will then remove any audio that fits its frequency, from the rest of the track. E.g. you can select hiss from a blank part of a track you recorded from an old cassette, and it will remove that hiss from the entire track.
Is there a (preferably freeware) audio editor that has this specific feature?
Many thanks!

Hi //eBoy,
I've never heard of any program that could memorize a sound and then remove that sound from another recording. Sound is too variable to be able to exactly match the frequency, amplitude, phase and harmonics of a "noise" to invert it and cancel that same "sounding" noise somewhere else.
Searching here for "remove hiss" the best suggestion appears to be lowering the undesired frequency with a band-stop filter (band equalizer), but of course, if there were any desired sounds with that same frequency, they would be attenuated too.
Topic : Removing Hiss ( Soundtrack Pro)
and
Topic : Removing Hiss (GarageBand '09)
ivan54

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What audio editor lets you select a type of sound to remove (e.g. hiss)?

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