We have a a few playlists with varied music useful for testing (not been updated in a while, I will put that on my todo list). We've also tried to have a fair amount of Norwegian and Scandinavian tracks, so perhaps you discover some new artists as well.
TIDAL:
(Manta development playlist):
Listen to Sigberg Audio MANTA.1 Dual Cardioid Development playlist on TIDAL
tidal.com
(Subwoofer demo tracks):
Listen to Sigberg Audio Subwoofer Demo Tracks on TIDAL
tidal.com
(Loudspeaker demo tracks):
Listen to Sigberg Audio Loudspeaker Demo Tracks on TIDAL
tidal.com
Spotify:
(Manta development playlist):
Sigberg Audio MANTA Dual Cardioid Development playlist · Playlist · 85 songs · 69 likes
open.spotify.com
(Subwoofer demo tracks):
Sigberg Audio Subwoofer Demo Tracks · Playlist · 99 songs · 372 likes
open.spotify.com
(Loudspeaker demo tracks):
Sigberg Audio Loudspeaker Demo Tracks · Playlist · 99 songs · 282 likes
open.spotify.com
I know people have duplicated these to Quboz in the past as well, so it might be possible to find them there by searching for Sigberg or Sigberg Audio.