I also have tinnitus in both ears. I have constant crickets and cicadas outside and fish tanks in every major room of the house. So it's totally masked and I rarely notice it unless I lay on one ear in bed.
For me it never started until I tried DMT and harmalas. I still can't identify them as the cause but it seems possible. There are studies out recently that have shown hearing related synapses to being stuck in the "always on" state causes tinnitus in some cases (as linked previously, but I read this before now). They are developing treatments... but it will be a while yet.
Meanwhile, consider getting some fish tanks. They are lovely creatures and the constant tinkling of water and popping of bubbles is not such a bad thing to live with.

How about using Vinpocetine (found in the common ornamental periwinkle plant)? Anyone have experience with that to help with Tinnitus?

There is a free website that offers notch therapy. This therapy can be looked up on the literature. It is currently experimental (neither confirmed or denied). Basically, you identify your tinnitus frequency, and notched white noise is generated for you that has that frequency removed as a therapy.

If interested check it out at https://tinnitusnotch.com/

I'd recommend reading up on notch therapy before trying it out (e.g. protocols call for 3 hours a day, etc).

Thanks Loveall. I'll definitely be looking closely at that site and the research behind it.
Since this thread started my tinnitus has got worse. It seems that every time I visit hyperspace I bring back more high frequencies with me. To actually have a moment of silence during my sober waking hours would be a welcome relief.

As it is LSD is the only thing I have found that stops it. Which is pleasant enough, but I can't stay tripping 24/7.

This is interesting! Now that you mentioned it, I feel the same. I think I'm more sensitive to sensory information altogether. Colors are more vibrant after tripping and my smell has improved. I think this has to do with being more aware of tinnitus.
It's somewhat annoying but also something that is probably difficult to cure. My approach has been to accept the choices I did long time ago that lead to this condition. Listening to velvet noise has helped me, when I want to be in silence but want to get rid of the ringing for a while.