Someone did an extensive review on 1/29/2005.
https://www.audioasylum.com/reviews/Accessory/Rain-Tinge/Resolution-Enhancement-for-CD-and-DVD-playb...However, noting the music that the reviewer liked, I find the review highly suspect.
"favorites that Raintinge have a huge impact on and make them listenable to me (made my long day special)...
1. Hayley Westenra, "Pure"... - this is a very beautiful voice. The voice and hipnotic nasal resonance just instantly brightens my day...even at some hateful hours like 4 in the morning. You haven't lived until you experience this voice when it is accurate.
2. a collection of Sarah Brightman... - quite the same as Ms. Westenra and much more trained to sing more different notes and musical style.
3. Norah Jones, SACD... -with all the hype about extremely high resolution for a more accurate sound - it's just the same problem as all the CDs and other "optical" disks and just the same improvements when using the color system.
4. Diane Krall, SACD... -unusually sexy voice...it must be her amazing control of her nasal resonance...would she have a sexy voice if she snorts through her nasal like a pig? I told you before nasal resonance dominates female voice.
5. a collection of Jennifer Warnes... - she has the most delicate feminine nasal resonance. If she sounds like a man talking, you have a bad stereo. My favorite to torture test stereo for understanding accuracy.
5. the Innocence Mission, "befriended"... -(I bought 2 LPs!) if you 're into shy childhood story and geeky poetry like Morrissey and Simon & Garfunkle, this is the best with a beautiful voice that is as complex to play as Jennifer Warnes.
6 a collection of the Corrs, DVD... -It's almost like super models have a talent to sing. It is heart-warming when the color system made each sister look so pretty and similar in their sisterly kind of way (tough choice if I have to chose one of them).
7. Soda Club, "anthem alert", CD and DVD... - don't look at this DVD if you don't normally look at super models. Their voices are beautiful in their own way. It's what I usually hear everyday talking to girls.
8. Bond, DVD... - visually and sonically when using the color system, it is so good it hurts.
No RainTinge for me unless someone reviews it using better recordings/performances.