Firewire Audio on Monterey 12.6

Good afternoon,

I recently upgraded my imac to Big Sur the latest version available. i immediately encountered problems with my firewire sound card. While up to Catalina 10.15.7 everything always worked perfectly, upgrading the upgrade to big sur has created quite a few problems, i.e. the audio interface is recognized regularly but no sound comes out playing an mp3 or video from youtube. Its control panel works perfectly, it hooks the sound card, it is synchronized, every command on the software control panel interacts with the hardware. When playing videro on youtube or an mp3 visually there is no activity on the indicators in the mixer panel. The sound card is recognized by Big Sur correctly and everything configured as it should. The sound card is connected via firewire 400/400 cable fully functional and already tried to replace. I read on the internet that there have been several cases with this problem and that it would seem that from Big Sur to Monterey, Apple has decided to drop functions from firewire until its final funeral with ventura. This technology, considered obsolete by Apple but still very effective, leads Apple to make a radical choice without regard for its customers and the many recording studios around the world who find themselves forcibly changing hundreds of thousands of dollars in recent hardware. I hope this is a hoax, because it would sound absurd as a choice. Anyway, I ask you what I can do to get my sound card (Focusrite Liquid 56) to work on my Mac as it did with Catalina. I point out that I have contacted Focusrite support. To their knowledge my sound card is working and compatible with the latest driver up to Monterey. No adapters are needed but the firewire connection is. The sound card tested on Windows works perfectly.