Luckily my audiologist's field is primarily neurosensory science and she's up to date with much of the research. I asked her why digital audio is a burden for some, she said they don't know why, they just know at this stage there is a link for some.
I've not personally started on the digital audio as of yet, I've had to delay it. My volume and pitch fluctuate as it does for most, but I went for a walk the other day and it was a particularly loud one due to some sort of distant power tool and I'm now in a 'setback' (an additional intermittent beeping sound tone in the right ear.)
I actually wanted to ask yourself and
@ZFire, if your setbacks ever included additional tones? I hope they were temporary. Until now it had been a good 2-3 months before I acquired a new tone, so this is a bit of a bummer.
I'm glad it seems you're getting some success from your TV experiment, I've only had a few short calls and I don't recall if they've spiked my tinnitus or not. I'm extremely careful about taking phone calls at present.