@hazelnot my usual pipeline for clearing up vocals like that is noise gate -> compressor -> EQ (a hard high-pass at 100hz is always good)
in VST land i use Cockos' ReaPlugs for noise gate and Melda Productions' free plugins for compressor and EQ, those should run fine in Wine, otherwise i'm not sure what you could use but those would be the "generic" terms for these filters
a de-esser would also help but i've yet to find a good free one, if you do give me a shout
@mavica_again I pretty much just use whatever Audacity/Tenacity comes with plugin/effects wise, but it does have I basically all of those built-in afaik lol
@hazelnot in audacity you should be able to use, i think it calls it a noise removal, if you calibrate it with a track of just your mouth sounds and then apply the removal to your voice track, it could help some. though that kind of noise removal can also make the voice sound a bit muddy depending on how you use it