i've just bought the duet 2 and had big problems with hiss and background noise while trying to record a Yamaha digital piano through it. I've realised that it's the piano causing it as it's outputs are very noisy. A music shop suggested i change the input parameter from 'instr' to '-10dbv' to remove gain from a source which seems to have loud output. I've done this but the duet controls on screen now change to a non-controllable volume XLR connection. While changing the input to -10dbv has completely stopped the hiss it has also muted the piano and i can no longer hear it at all while trying to record in logic pro. I think this is because the piano is connected by two jack to jack (1/4 inch inputs) but on changing to the '-10dbv' input on the duet 2 it's showing an XLR connection. Does this suggest then i now have to change my leads from the piano to jack (1/4 inch) to XLR instead of jack to jack in order for it to work without any hiss or background noise? I really don't understand why this should be necessary though...The duet 'inst' input setting should easily accommodate guitar AND keyboards so it says in the user guide and online...Any help/advice greatly appreciated. Thanks!