No sound on twitch

[Skyline]

Trying to stream from PS4 to twitch 2 Koei Tecmo games have no sound
Bladestorm: Nightmare and Samurai Warriors 4

[Mr.Honda]

It's not just those 2 games, most (if not all) KT games are affected.

While not an official explanation, speculation is that it has to do with VA/music licensing copyrights.