it removes most of the main instruments with karaoke
the only one yet ive found that works good with the 8-Bit modifier was "Inside The Castle Walls", By Koji Kondo 1996 For Super mario 64
echo is like that tunnel sound effect modifier.
radio just makes it kinda low quality
whenever i listen to something with the radio modifier for some time and then turn it off it feels like ive cleared my ears.