These plugins have been around for awhile and have a good rep.

Here’s a review from Sound On Sound.
https://www.soundonsound.com/reviews/sonnox-restore

Note: PC only, 64bit VST2 (no VST3)
Does not support external sidechaining – which is a real shame, for me that makes this plugin 90% less useful.

If you’re just looking for a freebie that handles hipass/lowpass/saturation that handles sidechaining with a decent GUI:
Filtron – Polyverse Music

Cons: higher CPU usage…Read More

I wonder if they were brought down by a data loss event (hardware failure, ransomware event, system hacked, etc.).
Many companies think they’re covered – that all they have to do was restore their most recent backup and rebuild from there only to discover

1. Their backup data was not readily accessible.
   Because of its size (terabytes) their online…

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I’d love to have one of these but even $1399 is too pricey for my budget

As a developer – the problem with issuing a generic discount codes (not tied to specific accounts) that are not usage limited (E.G. only X number of uses grant the discount) is that it can be easily abused – such as someone posting it in a public forum.
And when that happens you’re pretty much SOL.

Granted in spite of multiple safeguards mistakes…Read More