Does anyone have a hissing sound using a condenser mic? Anytime the mic is active,just tap on it or talk/sing I get a hissing sound through the t4 speakers or my JBL speakers or headphones.... It is annoying.... I have been in contact with Yamaha Tech support and they got an engineer involved and they don't know why... I am using a Shure Beta 87 condenser mic powered by a Sterling Audio PHP-1 phantom power unit.... I also tried my presonus studio channel and it seems to be worse. I had my PSR S900 and it was dead silent.... I have been struggling with my new T4 with the voices but with all of your help I am very pleased with it now but not the harmonizer... Has anyone noticed this with their T4 and mic combo? I also tried a dynamic mic AKG D150 and still get the same result through the Studio channel but not direct into the T4.... Thanks Ron