Remastering older recordings ?

[Trebor]

Its probably not possible to make a silk purse out of a Sow’s ear, but I’ve had pretty good luck so far I think.
New recordings are even worse, yea just make it LOUD ! Never mind the fact its recorded way too loud, which wrecks the dynamics of the recording …

Undoing dynamic-range-compression is next to impossible.
Expansion is the opposite of compression.
I recently found a free plugin which is capable of multi-[6]-band expansion …

Free (v3) ToneBooster's plugins

https://www.toneboosters.com/support.html click on “Where can I find older (legacy v3) plugins ?”. Many are improved versions of Jeroen Breebaart plugins, (32-bit Windows only), but these (v3) are 64-bit versions, Windows & Mac. DeEssers, compressors, equalizers, limiters, tape emulation, device/room emulation, bit-crush, gate, reverb, chorus, delay … IMO well worth the effort of download.

Here is a simpler 2-band expander plugin (billed as an exciter) … [Free] [VST/AU plugin] La Petite Excite