Guitar Hero Metallica Issue

Hi there, I'm having problems running the Guitar Hero games. Rock Band games works really fine but Guitar Hero Metallica, Van Halen, Warriors of Rock and 5 gives me lag. I don't know if this is an audio issue or a gpu issue because I disable the audio out and the game works fine (except for the flickering) but it runs smoothly. Also, this issue happens when I enter in a song the game starts lagging but when I hit restart the game runs the song almost perfectly until I hit the star power and the game starts to lag again. I don't know if it's because my processor can't run this games. But if there's a fix please tell me.

These are my specs:
Processor: Intel Core i7-3770k 3.50GHz
RAM: 16GB
GPU: Radeon ™ RX 470 Graphics