My Macchiato produces a lot of hiss. It’s much more than all my other synths. It’s apparent from the moment it’s powered up. I can hear the hiss both while the instrument is and is not playing. The hiss is at the same level when the volume is all the way down and all the way up. I’ve tried both a new battery and my Zuma power supply, neither have any affect on the hiss.
Is there a schematic for the amp section available? I can’t read all the paths on the board. All my components are installed correctly and nothing looks damaged. Are there modifications I can make to the components to get a cleaner signal that is more of a line level than headphone level? I don’t need that much amplification for my application.