[zogomoox]

For that I used Reason (digital audio workstation), create a single sine wave synth and played on the keyboard until I found the right frequency. I already knew my tinnitus was a low one for me (sounded like a mains hum) so was looking in the 20 - 200 Hz range.

You don't need the exact frequency really, just create a white noise sample in Audacity. The filtering just helps to allow playing the noise at the lowest overall level possible while still being effective in suppressing the tinnitus.

I think I could have achieved the same filtering using one of those hi-fi equalizer modules that were all the rage in the 80s and 90s.

[EvanAnderson]

I tried to do something similar, but I discovered that my hearing range ends at a lower frequency than my tinnitus' apparent frequency. It's interesting that my body is synthesizing a signal higher than I can actually hear.