I am using hd500x plugged in directly via USB to a Macbook pro. I get the sounds. Both the guitar and the computer playback sound fine. However, volume controls on the mac does not seem to work. I tried the slider under the sys preferences > sound (hd500x selected as output device), but that does not change the output level either - mac's volume change effect plays each time I play with the slider, but its volume is always the same.. Volume knobs on the pedal are set to reasonable levels. master volume knob just turns up everything (computer + guitar), while amp knob adjusts the guitar. Even when I max the amp volume out, guitar output is much quieter than the computer, which means I need to turn the computer down, which I cannot do.
Does anyone have this problem?