Yes. I had the REM test done with the NHS. It made a massive difference. In actual fact I was blown away. For over 15 years I believed that music just did not sound good with digital hearing aids. After taking the REM test, music sounded sensational, like it did 20 years ago when I wore analog hearing aids. Essentially, the audiologist upped the gain by around 6db to 9 db from 250khz to 1000khz. I couldn’t believe the difference, and cursed myself for believing that the reason why music sounded so uninvolving was because of digital technology. It wasn’t, at least it hasn’t been since then with the Oticon Synergy and Phonak Virto V70 (private aids), once I made this discovery.
I will never have a hearing aid fitted now without demanding an REM test, or in situ testing. Phonak are notorious for underprescribing the gain, and I had the same issue with the NHS oticons.