HI
@Eric N
It must be difficult for you managing multiple tones of tinnitus and it's unfortunate that you are having to endure this misery. If you can give me some more background on your tinnitus, I think it would help me advise you on a way forward to hopefully give you some relief.
I see that your tinnitus was originally caused by "loud noise/sound". Have you had any treatment at ENT or been referred a Hearing Therapist or Audilogist for tinnitus treatment and management? Do you experience any hyperacusis sensitivity to sound? If so have you had any treatment for this?
You need to be careful of using "masking sounds" as this can spike the tinnitus as you have found. Try not to mask any of the sounds - instead, I suggest that you use a sound different to what you are hearing: nature sound for instance, and set the level slightly below your tinnitus sounds. This is known as "sound enrichment" if you don't already know ( but suspect you do) and is the preferred method advised my Hearing Therapists and Audiologists, instead of masking the tinnitus with a sound/s so that it can't be heard.
Masking tinnitus is not easy and when attempted is usually unsuccesful. As soon as the masking sound is removed or stopped temporarily, the brain focuses back on the tinnitus and it often appears louder and more intrusive.
Do you listen to music through headphones or use a Headset to listen to Audio even at low volume? When "noise induced" tinnitus spikes or becomes worse the usual reason/cause is due to further sound exposure. If you have hyperacusis and this hasn't been treated, depending on how severe it is, this can make you more sensitive to sound and even cause a person to develope multiple tinnitus sounds over time because the hyperacusis hasn't been treated.
All the best
Michael