Hello, I have experienced an issue where I will be listening to a song which many dynamics, lets say "Bohemian Rhapsody". When the lead guitar kicks in with its high notes, I hear a muted high pitch noise such as a screech as If either the speaker or the receiver isn't able to produce that sound. WHich maight be the cause? Also, at parts, the music sounds to mixed together and the instruments have no headroom. I am running a very cheap setup. JBL E80's. Yamaha RX V2090 , with the Treble set to 6+ dB. Might be the cause. The volume I'm playing it isn't loud also, it is about 50 - 60 dB. I'm feeding my receiver with an Asus Xonar Essence STX from my computer using FLAC files.